Date post: | 06-Jul-2018 |
Category: |
Documents |
Upload: | susana-torres |
View: | 214 times |
Download: | 0 times |
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 148
Accepted Manuscript
A systematic review and meta-analysis of energy intake and weight gain in pregnancy
Hiba Jebeile MNUTRDIET Ms Jovana Mijatovic MNUTRDIET Ms Dr Jimmy Chun
Yu Louie PHD Dr Tania Prvan PHD Dr Jennie C Brand-Miller PHD
PII S0002-9378(15)02653-8
DOI 101016jajog201512049
Reference YMOB 10857
To appear in American Journal of Obstetrics and Gynecology
Received Date 20 July 2015
Revised Date 1 December 2015
Accepted Date 23 December 2015
Please cite this article as Jebeile H Mijatovic J Louie JCY Prvan T Brand-Miller JC A systematic
review and meta-analysis of energy intake and weight gain in pregnancy American Journal of Obstetrics
and Gynecology (2016) doi 101016jajog201512049
This is a PDF file of an unedited manuscript that has been accepted for publication As a service toour customers we are providing this early version of the manuscript The manuscript will undergo
copyediting typesetting and review of the resulting proof before it is published in its final form Please
note that during the production process errors may be discovered which could affect the content and all
legal disclaimers that apply to the journal pertain
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 248
ACCEPTED MANUSCRIPT
1
A systematic review and meta-analysis of energy intake and weight gain in pregnancy
Ms Hiba JEBEILE MNUTRDIET Ms Jovana MIJATOVIC MNUTRDIET Dr
Jimmy Chun Yu LOUIE PHD Dr Tania PRVAN PHD Dr Jennie C BRAND-
MILLER PHD
School of Molecular Bioscience and Charles Perkins Centre The University of Sydney
Camperdown 2006 NSW Australia (HJ JM JCYL JCBM)
Department of Statistics Faculty of Science and Engineering Macquarie University Sydney
2109 NSW Australia (TP)
Equal contribution from these authors
Author surnames JEBEILE MIJATOVIC LOUIE PRVAN BRAND-MILLER
Source(s) of support No external funding was required to facilitate this research or
preparation of the manuscript
Conflict of interest statement The authors report no conflict of interest
Corresponding author
Professor Jennie C Brand-Miller
Level 6 West The Hub
D17 Charles Perkins Centre
The University of Sydney NSW 2006
Australia
Ph +61 2 93513759
E jenniebrandmillersydneyeduau
Reprints will not be available Abbreviations BMI body mass index BMR basal metabolic rate GDM gestational
diabetes mellitus GWG gestational weight gain IOM Institute of Medicine PAL physical
activity level RCT randomized controlled trial SD standard deviation SMD standardized
mean difference t time point
Word count Abstract = 333 words Main text = 3480 words
Number of tables and figures 2 and 5 respectively
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 348
ACCEPTED MANUSCRIPT
2
Condensation Women report little or no change in energy intake during pregnancy
Running head Energy intake and weight gain in pregnancy
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 448
ACCEPTED MANUSCRIPT
3
ABSTRACT
BACKGROUND Gestational weight gain within the recommended range produces optimal1
pregnancy outcomes yet many women exceed the guidelines Official recommendations to2
increase energy intake by ~ 1000 kJday in pregnancy may be excessive 3
OBJECTIVE To determine by meta-analysis of relevant studies whether greater increments4
in energy intake from early to late pregnancy corresponded to higher or excessive gestational5
weight gain6
DATA SOURCES We systematically searched electronic databases for observational and7
intervention studies published from 1990-present The databases included Ovid Medline8
Cochrane Library Excerpta Medica DataBASE (EMBASE) Cumulative Index to Nursing9
and Allied Health Literature (CINAHL) and Science Direct In addition we hand searched10
reference lists of all identified articles11
STUDY ELIGIBILITY CRIETRIA Studies were included if they reported gestational12
weight gain and energy intake in early and late gestation in women of any age with a13
singleton pregnancy Search also encompassed journals emerging from both developed and14
developing countries15
STUDY APPRAISAL AND SYNTHESIS METHDOS Studies were individually assessed16
for quality based on the Quality Criteria Checklist obtained from the American Dietetic17
Association Evidence Analysis Manual Publication bias was plotted using a funnel plot with18
standard mean difference against standard error Identified studies were meta-analyzed and19
stratified by Body Mass Index study design dietary methodology and country status20
(developeddeveloping) using a random-effects model21
RESULTS Of 2487 articles screened 18 studies met inclusion criteria On average women22
gained 120 (28) kg (Standardized Mean Difference = 1306 P lt 00005) yet reported only a23
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 548
ACCEPTED MANUSCRIPT
4
small increment in energy intake that did not reach statistical significance (~475 kJday24
Standard Mean Difference = 0266 P = 0016) Irrespective of baseline Body Mass Index25
study design dietary methodology or country status changes in energy intake were not26
significantly correlated to the amount of gestational weight gain (r = 0321 P = 011)27
CONCLUSION Despite rapid physiological weight gain women report little or no change28
in energy intake during pregnancy Current recommendations to increase energy intake by ~29
1000 kJday may therefore encourage excessive weight gain and adverse pregnancy30
outcomes31
KEYWORDS energy intake first trimester gestational weight gain pregnancy third32
trimester33
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 648
ACCEPTED MANUSCRIPT
5
INTRODUCTION34
In developed nations one third or more of women of childbearing age are overweight or35
obese1-3
Excessive pre-conception body weight is a recognized risk factor for adverse36
pregnancy outcomes including gestational diabetes mellitus (GDM) pregnancy-induced37
hypertension pre-eclampsia and caesarean delivery4 Maternal obesity is also linked with38
increased risk of macrosomia3 stillbirth
5 pre-term birth
6 and congenital malformation
739
Offspring of overweight and obese women are at increased risk of obesity in childhood and40
young adulthood thereby creating an intergenerational vicious cycle8-10
41
Restricting or optimizing gestational weight gain (GWG) is one of the few interventions that42
can reduce adverse pregnancy outcomes11
The Institute of Medicine (IOM) specifies ranges43
of desirable weight gain for underweight normal weight overweight and obese pregnant44
women that have been adopted by other countries12
However many pregnant women gain45
more than is optimal13
and find it difficult to lose the excess weight post-pregnancy14
46
A logical assumption is that additional food intake is required to achieve the desirable rate of47
weight gain in pregnancy Indeed mathematical models have been developed to determine48
the theoretical additional energy costs involved in pregnancy15
The cumulative absolute cost49
for women with a normal BMI and a mean GWG of 120 kg has been estimated to be ~32050
MJ distributed as an additional 0-300 kJday in the first trimester 1000-1500 kJday in the51
second and 1800-2100 kJday in the third16
Nonetheless energy requirements during52
pregnancy will be influenced by multiple factors including pre-pregnancy weight BMI53
maternal age stage of gestation rate of GWG and increases in energy expenditure relating to54
an increase in body mass and hence basal metabolic rate (BMR)1718
55
Despite the theory recent studies suggest that the current generation of women consume very56
little additional food energy to sustain a healthy pregnancy A meta-analysis of 23 studies in57
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 748
ACCEPTED MANUSCRIPT
6
well-nourished women reported an average increase of only ~140 kJday ie a small fraction58
of the theoretical calculation or current recommendations17
It is conceivable that pregnant59
women now require less energy than earlier generations due to reductions in incidental60
physical activity and increasing sedentariness19
Pregnancy guidelines that recommend an61
additional 2000 kJday in the third trimester may result in excessive GWG and adverse62
pregnancy outcomes63
In this analysis our objective was to determine whether a greater increment in reported64
energy intake from early to late pregnancy corresponded to higher or excessive GWG We65
systematically searched for observational and randomized controlled trials published over the66
past 25 years that reported GWG along with energy intake in early and late pregnancy67
METHODS68
Search Strategy69
A systematic literature search was undertaken in August-October 2014 by 2 independent70
student dietitians (JM and HJ) A starting date of 1990 was specified so that the outcomes71
reflected the current generation of women whose pregnancy advice may have been influenced72
by IOM guidelines20
We searched Ovid Medline Cochrane Library Excerpta Medica73
DataBASE (EMBASE) Cumulative Index to Nursing and Allied Health Literature74
(CINAHL) and Science Direct for studies that reported energy intake in early and late75
pregnancy and GWG in singleton pregnancies in women of any age Randomized controlled76
trials (RCT) and observational cohort and longitudinal studies were eligible for inclusion77
The following search terms were employed ldquopregnantrdquo OR ldquopregnancyrdquo OR ldquopregnant78
womanrdquo OR ldquogestationrdquo OR ldquomaternalrdquo AND ldquoenergy intakerdquo OR ldquomacronutrientrdquo OR79
ldquodietary fatrdquo OR ldquodietary proteinsrdquo OR ldquodietary carbohydraterdquo OR ldquodietary intakerdquo OR80
ldquocalorie intakerdquo OR ldquokilojoule intakerdquo AND ldquoweight gainrdquo OR ldquobody weightrdquo OR ldquoweight81
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 848
ACCEPTED MANUSCRIPT
7
changerdquo OR ldquobody mass indexrdquo OR ldquoBMIrdquo Hand-searching was conducted to identify82
additional studies Studies reported as withdrawn in the database and retrospective studies83
that preceded 1990 were excluded84
Study Selection85
Full term pregnancy was defined as 37 ndash 42 weeks gestation21
Women were classed as86
underweight normal overweight and obese category according to IOM criteria Countries87
were classified as lsquodevelopedrsquo or lsquodevelopingrsquo based on the United Nations criteria22
In88
relation to energy intake early and later pregnancy were defined by timepoints (t1 and t2) at89
least 12 or more weeks apart where t1 lt18 weeks and t2 gt30 weeks gestation (studies90
reporting data at intervals lt12 weeks were excluded) GWG was recorded as the mean plusmn SD91
where data was collected at lt18 weeks (t1) and gt34 weeks gestation (t2) except in 2 studies92
2324 where the value was calculated as the difference in weight at the 2 timepoints and the SD93
was calculated25
Studies published in a language other than English were excluded if a94
translation was not available In the RCT the control and intervention groups were analyzed95
as separate groups Efforts were made to contact authors for additional data regarding their96
respective studies97
Data extraction98
Data were independently extracted using standardized forms in the Excel spreadsheet which99
collected information on author title study type year published quality rating population100
characteristics (country age number of participants BMI parity) dietary collection method101
weeks gestation at time of data collection energy intake at two time points (t 1 and t2)102
macronutrient intake (g or energy) weight (t1 and t2) and GWG Data were cross-checked103
for accuracy and discrepancies resolved through discussion or involvement of a third party104
(JBM or JCYL)105
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 948
ACCEPTED MANUSCRIPT
8
Statistical analysis106
The primary outcome measures were standardized mean difference (SMD) in energy intake107
and GWG from early to late pregnancy Data were meta-analyzed collectively and stratified108
by developed and developing countries BMI (underweight normal overweight and obese)109
study design (observational and RCT) and dietary assessment methodology A random-effect110
model assumed heterogeneity among studies The Moodrsquos median test was used to test the111
equality of medians of SMD for energy intake and weight gain between developed and112
developing countries Because of small sample sizes within each BMI group the median113
GWG and interquartile range were used to assess mean weight gain compared to the IOM114
recommendations To calculate SMDs of mean weight gain between 2 timepoints (t1 and t2) a115
Spearman correlation coefficient of 085 was applied 26
Similarly for the 26 subgroups with116
reported energy intake at t1 and t2 a Spearman correlation coefficient of 074 was assumed For117
the studies which provided a range for weight rather than SD a value was imputed where r =118
085 Analyses were repeated using r = 08 or 09 and r = 07 or 08 for weight and energy119
respectively did not alter findings Data were analyzed using Comprehensive Meta-Analysis120
(CMA) package version 22 (Biostat Englewood New Jersey USA) and presented in the121
form of forest plots P-values of lt 001 were considered statistically significant as 7122
comparisons were made in this study including Body Mass Index countryrsquos economic status123
dietary collection method study type energy intake macronutrient distribution and124
gestational weight gain This was achieved using Bonferroni correction which divides the125
original P = 005 by the number of estimates made producing a new P-value = 0007 which126
was rounded to 001127
Assessment of Risk of Bias128
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1048
ACCEPTED MANUSCRIPT
9
Studies were individually assessed at a study level for bias and quality based on the Quality129
Criteria Checklist obtained from the American Dietetic Association Evidence Analysis130
Manual27
Only the studies which obtained a positive or neutral rating were included131
Publication bias was assessed by developing a funnel plot using standard difference in means132
and standard error as x and y-intercepts respectively133
RESULTS134
The electronic search revealed 2440 articles with a further 47 identified by hand-searching135
Of these 2301 did not meet inclusion criteria in the main because they did not report energy136
intake at 2 time points at least 12 weeks apart Three potential studies were excluded because137
of missing data28-30
The screening and selection process resulted in 18 studies of 2644138
women published between 1992 and 2013 (Figure 1) Fourteen studies were observational139
studies232431-42
most conducted in a representative population with a mean BMI in the140
normal range One study41
was in an overweight population and 1 study33
reported data by141
BMI category Of the 4 RCTs43-46
1 was an intervention in an overweight population44
and142
2 in an obese population4346
all aimed at limiting GWG One study45
had a population143
group with a mean BMI in the normal range with interventions comparing pregnancy144
outcomes on a low GI diet vs healthy eating advice145
Of the 18 studies that met inclusion criteria 2 obtained a positive quality rating and 16 were146
neutral (Table 1) Within studies the number of study participants ranged from 10 to 620147
with a mean (SD) age 296 (17) years and BMI 253 (49) kgm2 Seven studies had a148
retention rate of gt8232353638394145
6 ranged 63-78233134424346
1 of 5533
and 3 did149
not report243740
Sixteen subgroups reported total weeks gestation with an average of 396150
(043) weeks Only 6 studies reported parity mean = 18 (232) Dietary data was collected on151
average at 12 (26) weeks and 35 (21) weeks gestation The most frequent dietary collection152
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 248
ACCEPTED MANUSCRIPT
1
A systematic review and meta-analysis of energy intake and weight gain in pregnancy
Ms Hiba JEBEILE MNUTRDIET Ms Jovana MIJATOVIC MNUTRDIET Dr
Jimmy Chun Yu LOUIE PHD Dr Tania PRVAN PHD Dr Jennie C BRAND-
MILLER PHD
School of Molecular Bioscience and Charles Perkins Centre The University of Sydney
Camperdown 2006 NSW Australia (HJ JM JCYL JCBM)
Department of Statistics Faculty of Science and Engineering Macquarie University Sydney
2109 NSW Australia (TP)
Equal contribution from these authors
Author surnames JEBEILE MIJATOVIC LOUIE PRVAN BRAND-MILLER
Source(s) of support No external funding was required to facilitate this research or
preparation of the manuscript
Conflict of interest statement The authors report no conflict of interest
Corresponding author
Professor Jennie C Brand-Miller
Level 6 West The Hub
D17 Charles Perkins Centre
The University of Sydney NSW 2006
Australia
Ph +61 2 93513759
E jenniebrandmillersydneyeduau
Reprints will not be available Abbreviations BMI body mass index BMR basal metabolic rate GDM gestational
diabetes mellitus GWG gestational weight gain IOM Institute of Medicine PAL physical
activity level RCT randomized controlled trial SD standard deviation SMD standardized
mean difference t time point
Word count Abstract = 333 words Main text = 3480 words
Number of tables and figures 2 and 5 respectively
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 348
ACCEPTED MANUSCRIPT
2
Condensation Women report little or no change in energy intake during pregnancy
Running head Energy intake and weight gain in pregnancy
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 448
ACCEPTED MANUSCRIPT
3
ABSTRACT
BACKGROUND Gestational weight gain within the recommended range produces optimal1
pregnancy outcomes yet many women exceed the guidelines Official recommendations to2
increase energy intake by ~ 1000 kJday in pregnancy may be excessive 3
OBJECTIVE To determine by meta-analysis of relevant studies whether greater increments4
in energy intake from early to late pregnancy corresponded to higher or excessive gestational5
weight gain6
DATA SOURCES We systematically searched electronic databases for observational and7
intervention studies published from 1990-present The databases included Ovid Medline8
Cochrane Library Excerpta Medica DataBASE (EMBASE) Cumulative Index to Nursing9
and Allied Health Literature (CINAHL) and Science Direct In addition we hand searched10
reference lists of all identified articles11
STUDY ELIGIBILITY CRIETRIA Studies were included if they reported gestational12
weight gain and energy intake in early and late gestation in women of any age with a13
singleton pregnancy Search also encompassed journals emerging from both developed and14
developing countries15
STUDY APPRAISAL AND SYNTHESIS METHDOS Studies were individually assessed16
for quality based on the Quality Criteria Checklist obtained from the American Dietetic17
Association Evidence Analysis Manual Publication bias was plotted using a funnel plot with18
standard mean difference against standard error Identified studies were meta-analyzed and19
stratified by Body Mass Index study design dietary methodology and country status20
(developeddeveloping) using a random-effects model21
RESULTS Of 2487 articles screened 18 studies met inclusion criteria On average women22
gained 120 (28) kg (Standardized Mean Difference = 1306 P lt 00005) yet reported only a23
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 548
ACCEPTED MANUSCRIPT
4
small increment in energy intake that did not reach statistical significance (~475 kJday24
Standard Mean Difference = 0266 P = 0016) Irrespective of baseline Body Mass Index25
study design dietary methodology or country status changes in energy intake were not26
significantly correlated to the amount of gestational weight gain (r = 0321 P = 011)27
CONCLUSION Despite rapid physiological weight gain women report little or no change28
in energy intake during pregnancy Current recommendations to increase energy intake by ~29
1000 kJday may therefore encourage excessive weight gain and adverse pregnancy30
outcomes31
KEYWORDS energy intake first trimester gestational weight gain pregnancy third32
trimester33
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 648
ACCEPTED MANUSCRIPT
5
INTRODUCTION34
In developed nations one third or more of women of childbearing age are overweight or35
obese1-3
Excessive pre-conception body weight is a recognized risk factor for adverse36
pregnancy outcomes including gestational diabetes mellitus (GDM) pregnancy-induced37
hypertension pre-eclampsia and caesarean delivery4 Maternal obesity is also linked with38
increased risk of macrosomia3 stillbirth
5 pre-term birth
6 and congenital malformation
739
Offspring of overweight and obese women are at increased risk of obesity in childhood and40
young adulthood thereby creating an intergenerational vicious cycle8-10
41
Restricting or optimizing gestational weight gain (GWG) is one of the few interventions that42
can reduce adverse pregnancy outcomes11
The Institute of Medicine (IOM) specifies ranges43
of desirable weight gain for underweight normal weight overweight and obese pregnant44
women that have been adopted by other countries12
However many pregnant women gain45
more than is optimal13
and find it difficult to lose the excess weight post-pregnancy14
46
A logical assumption is that additional food intake is required to achieve the desirable rate of47
weight gain in pregnancy Indeed mathematical models have been developed to determine48
the theoretical additional energy costs involved in pregnancy15
The cumulative absolute cost49
for women with a normal BMI and a mean GWG of 120 kg has been estimated to be ~32050
MJ distributed as an additional 0-300 kJday in the first trimester 1000-1500 kJday in the51
second and 1800-2100 kJday in the third16
Nonetheless energy requirements during52
pregnancy will be influenced by multiple factors including pre-pregnancy weight BMI53
maternal age stage of gestation rate of GWG and increases in energy expenditure relating to54
an increase in body mass and hence basal metabolic rate (BMR)1718
55
Despite the theory recent studies suggest that the current generation of women consume very56
little additional food energy to sustain a healthy pregnancy A meta-analysis of 23 studies in57
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 748
ACCEPTED MANUSCRIPT
6
well-nourished women reported an average increase of only ~140 kJday ie a small fraction58
of the theoretical calculation or current recommendations17
It is conceivable that pregnant59
women now require less energy than earlier generations due to reductions in incidental60
physical activity and increasing sedentariness19
Pregnancy guidelines that recommend an61
additional 2000 kJday in the third trimester may result in excessive GWG and adverse62
pregnancy outcomes63
In this analysis our objective was to determine whether a greater increment in reported64
energy intake from early to late pregnancy corresponded to higher or excessive GWG We65
systematically searched for observational and randomized controlled trials published over the66
past 25 years that reported GWG along with energy intake in early and late pregnancy67
METHODS68
Search Strategy69
A systematic literature search was undertaken in August-October 2014 by 2 independent70
student dietitians (JM and HJ) A starting date of 1990 was specified so that the outcomes71
reflected the current generation of women whose pregnancy advice may have been influenced72
by IOM guidelines20
We searched Ovid Medline Cochrane Library Excerpta Medica73
DataBASE (EMBASE) Cumulative Index to Nursing and Allied Health Literature74
(CINAHL) and Science Direct for studies that reported energy intake in early and late75
pregnancy and GWG in singleton pregnancies in women of any age Randomized controlled76
trials (RCT) and observational cohort and longitudinal studies were eligible for inclusion77
The following search terms were employed ldquopregnantrdquo OR ldquopregnancyrdquo OR ldquopregnant78
womanrdquo OR ldquogestationrdquo OR ldquomaternalrdquo AND ldquoenergy intakerdquo OR ldquomacronutrientrdquo OR79
ldquodietary fatrdquo OR ldquodietary proteinsrdquo OR ldquodietary carbohydraterdquo OR ldquodietary intakerdquo OR80
ldquocalorie intakerdquo OR ldquokilojoule intakerdquo AND ldquoweight gainrdquo OR ldquobody weightrdquo OR ldquoweight81
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 848
ACCEPTED MANUSCRIPT
7
changerdquo OR ldquobody mass indexrdquo OR ldquoBMIrdquo Hand-searching was conducted to identify82
additional studies Studies reported as withdrawn in the database and retrospective studies83
that preceded 1990 were excluded84
Study Selection85
Full term pregnancy was defined as 37 ndash 42 weeks gestation21
Women were classed as86
underweight normal overweight and obese category according to IOM criteria Countries87
were classified as lsquodevelopedrsquo or lsquodevelopingrsquo based on the United Nations criteria22
In88
relation to energy intake early and later pregnancy were defined by timepoints (t1 and t2) at89
least 12 or more weeks apart where t1 lt18 weeks and t2 gt30 weeks gestation (studies90
reporting data at intervals lt12 weeks were excluded) GWG was recorded as the mean plusmn SD91
where data was collected at lt18 weeks (t1) and gt34 weeks gestation (t2) except in 2 studies92
2324 where the value was calculated as the difference in weight at the 2 timepoints and the SD93
was calculated25
Studies published in a language other than English were excluded if a94
translation was not available In the RCT the control and intervention groups were analyzed95
as separate groups Efforts were made to contact authors for additional data regarding their96
respective studies97
Data extraction98
Data were independently extracted using standardized forms in the Excel spreadsheet which99
collected information on author title study type year published quality rating population100
characteristics (country age number of participants BMI parity) dietary collection method101
weeks gestation at time of data collection energy intake at two time points (t 1 and t2)102
macronutrient intake (g or energy) weight (t1 and t2) and GWG Data were cross-checked103
for accuracy and discrepancies resolved through discussion or involvement of a third party104
(JBM or JCYL)105
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 948
ACCEPTED MANUSCRIPT
8
Statistical analysis106
The primary outcome measures were standardized mean difference (SMD) in energy intake107
and GWG from early to late pregnancy Data were meta-analyzed collectively and stratified108
by developed and developing countries BMI (underweight normal overweight and obese)109
study design (observational and RCT) and dietary assessment methodology A random-effect110
model assumed heterogeneity among studies The Moodrsquos median test was used to test the111
equality of medians of SMD for energy intake and weight gain between developed and112
developing countries Because of small sample sizes within each BMI group the median113
GWG and interquartile range were used to assess mean weight gain compared to the IOM114
recommendations To calculate SMDs of mean weight gain between 2 timepoints (t1 and t2) a115
Spearman correlation coefficient of 085 was applied 26
Similarly for the 26 subgroups with116
reported energy intake at t1 and t2 a Spearman correlation coefficient of 074 was assumed For117
the studies which provided a range for weight rather than SD a value was imputed where r =118
085 Analyses were repeated using r = 08 or 09 and r = 07 or 08 for weight and energy119
respectively did not alter findings Data were analyzed using Comprehensive Meta-Analysis120
(CMA) package version 22 (Biostat Englewood New Jersey USA) and presented in the121
form of forest plots P-values of lt 001 were considered statistically significant as 7122
comparisons were made in this study including Body Mass Index countryrsquos economic status123
dietary collection method study type energy intake macronutrient distribution and124
gestational weight gain This was achieved using Bonferroni correction which divides the125
original P = 005 by the number of estimates made producing a new P-value = 0007 which126
was rounded to 001127
Assessment of Risk of Bias128
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1048
ACCEPTED MANUSCRIPT
9
Studies were individually assessed at a study level for bias and quality based on the Quality129
Criteria Checklist obtained from the American Dietetic Association Evidence Analysis130
Manual27
Only the studies which obtained a positive or neutral rating were included131
Publication bias was assessed by developing a funnel plot using standard difference in means132
and standard error as x and y-intercepts respectively133
RESULTS134
The electronic search revealed 2440 articles with a further 47 identified by hand-searching135
Of these 2301 did not meet inclusion criteria in the main because they did not report energy136
intake at 2 time points at least 12 weeks apart Three potential studies were excluded because137
of missing data28-30
The screening and selection process resulted in 18 studies of 2644138
women published between 1992 and 2013 (Figure 1) Fourteen studies were observational139
studies232431-42
most conducted in a representative population with a mean BMI in the140
normal range One study41
was in an overweight population and 1 study33
reported data by141
BMI category Of the 4 RCTs43-46
1 was an intervention in an overweight population44
and142
2 in an obese population4346
all aimed at limiting GWG One study45
had a population143
group with a mean BMI in the normal range with interventions comparing pregnancy144
outcomes on a low GI diet vs healthy eating advice145
Of the 18 studies that met inclusion criteria 2 obtained a positive quality rating and 16 were146
neutral (Table 1) Within studies the number of study participants ranged from 10 to 620147
with a mean (SD) age 296 (17) years and BMI 253 (49) kgm2 Seven studies had a148
retention rate of gt8232353638394145
6 ranged 63-78233134424346
1 of 5533
and 3 did149
not report243740
Sixteen subgroups reported total weeks gestation with an average of 396150
(043) weeks Only 6 studies reported parity mean = 18 (232) Dietary data was collected on151
average at 12 (26) weeks and 35 (21) weeks gestation The most frequent dietary collection152
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 348
ACCEPTED MANUSCRIPT
2
Condensation Women report little or no change in energy intake during pregnancy
Running head Energy intake and weight gain in pregnancy
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 448
ACCEPTED MANUSCRIPT
3
ABSTRACT
BACKGROUND Gestational weight gain within the recommended range produces optimal1
pregnancy outcomes yet many women exceed the guidelines Official recommendations to2
increase energy intake by ~ 1000 kJday in pregnancy may be excessive 3
OBJECTIVE To determine by meta-analysis of relevant studies whether greater increments4
in energy intake from early to late pregnancy corresponded to higher or excessive gestational5
weight gain6
DATA SOURCES We systematically searched electronic databases for observational and7
intervention studies published from 1990-present The databases included Ovid Medline8
Cochrane Library Excerpta Medica DataBASE (EMBASE) Cumulative Index to Nursing9
and Allied Health Literature (CINAHL) and Science Direct In addition we hand searched10
reference lists of all identified articles11
STUDY ELIGIBILITY CRIETRIA Studies were included if they reported gestational12
weight gain and energy intake in early and late gestation in women of any age with a13
singleton pregnancy Search also encompassed journals emerging from both developed and14
developing countries15
STUDY APPRAISAL AND SYNTHESIS METHDOS Studies were individually assessed16
for quality based on the Quality Criteria Checklist obtained from the American Dietetic17
Association Evidence Analysis Manual Publication bias was plotted using a funnel plot with18
standard mean difference against standard error Identified studies were meta-analyzed and19
stratified by Body Mass Index study design dietary methodology and country status20
(developeddeveloping) using a random-effects model21
RESULTS Of 2487 articles screened 18 studies met inclusion criteria On average women22
gained 120 (28) kg (Standardized Mean Difference = 1306 P lt 00005) yet reported only a23
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 548
ACCEPTED MANUSCRIPT
4
small increment in energy intake that did not reach statistical significance (~475 kJday24
Standard Mean Difference = 0266 P = 0016) Irrespective of baseline Body Mass Index25
study design dietary methodology or country status changes in energy intake were not26
significantly correlated to the amount of gestational weight gain (r = 0321 P = 011)27
CONCLUSION Despite rapid physiological weight gain women report little or no change28
in energy intake during pregnancy Current recommendations to increase energy intake by ~29
1000 kJday may therefore encourage excessive weight gain and adverse pregnancy30
outcomes31
KEYWORDS energy intake first trimester gestational weight gain pregnancy third32
trimester33
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 648
ACCEPTED MANUSCRIPT
5
INTRODUCTION34
In developed nations one third or more of women of childbearing age are overweight or35
obese1-3
Excessive pre-conception body weight is a recognized risk factor for adverse36
pregnancy outcomes including gestational diabetes mellitus (GDM) pregnancy-induced37
hypertension pre-eclampsia and caesarean delivery4 Maternal obesity is also linked with38
increased risk of macrosomia3 stillbirth
5 pre-term birth
6 and congenital malformation
739
Offspring of overweight and obese women are at increased risk of obesity in childhood and40
young adulthood thereby creating an intergenerational vicious cycle8-10
41
Restricting or optimizing gestational weight gain (GWG) is one of the few interventions that42
can reduce adverse pregnancy outcomes11
The Institute of Medicine (IOM) specifies ranges43
of desirable weight gain for underweight normal weight overweight and obese pregnant44
women that have been adopted by other countries12
However many pregnant women gain45
more than is optimal13
and find it difficult to lose the excess weight post-pregnancy14
46
A logical assumption is that additional food intake is required to achieve the desirable rate of47
weight gain in pregnancy Indeed mathematical models have been developed to determine48
the theoretical additional energy costs involved in pregnancy15
The cumulative absolute cost49
for women with a normal BMI and a mean GWG of 120 kg has been estimated to be ~32050
MJ distributed as an additional 0-300 kJday in the first trimester 1000-1500 kJday in the51
second and 1800-2100 kJday in the third16
Nonetheless energy requirements during52
pregnancy will be influenced by multiple factors including pre-pregnancy weight BMI53
maternal age stage of gestation rate of GWG and increases in energy expenditure relating to54
an increase in body mass and hence basal metabolic rate (BMR)1718
55
Despite the theory recent studies suggest that the current generation of women consume very56
little additional food energy to sustain a healthy pregnancy A meta-analysis of 23 studies in57
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 748
ACCEPTED MANUSCRIPT
6
well-nourished women reported an average increase of only ~140 kJday ie a small fraction58
of the theoretical calculation or current recommendations17
It is conceivable that pregnant59
women now require less energy than earlier generations due to reductions in incidental60
physical activity and increasing sedentariness19
Pregnancy guidelines that recommend an61
additional 2000 kJday in the third trimester may result in excessive GWG and adverse62
pregnancy outcomes63
In this analysis our objective was to determine whether a greater increment in reported64
energy intake from early to late pregnancy corresponded to higher or excessive GWG We65
systematically searched for observational and randomized controlled trials published over the66
past 25 years that reported GWG along with energy intake in early and late pregnancy67
METHODS68
Search Strategy69
A systematic literature search was undertaken in August-October 2014 by 2 independent70
student dietitians (JM and HJ) A starting date of 1990 was specified so that the outcomes71
reflected the current generation of women whose pregnancy advice may have been influenced72
by IOM guidelines20
We searched Ovid Medline Cochrane Library Excerpta Medica73
DataBASE (EMBASE) Cumulative Index to Nursing and Allied Health Literature74
(CINAHL) and Science Direct for studies that reported energy intake in early and late75
pregnancy and GWG in singleton pregnancies in women of any age Randomized controlled76
trials (RCT) and observational cohort and longitudinal studies were eligible for inclusion77
The following search terms were employed ldquopregnantrdquo OR ldquopregnancyrdquo OR ldquopregnant78
womanrdquo OR ldquogestationrdquo OR ldquomaternalrdquo AND ldquoenergy intakerdquo OR ldquomacronutrientrdquo OR79
ldquodietary fatrdquo OR ldquodietary proteinsrdquo OR ldquodietary carbohydraterdquo OR ldquodietary intakerdquo OR80
ldquocalorie intakerdquo OR ldquokilojoule intakerdquo AND ldquoweight gainrdquo OR ldquobody weightrdquo OR ldquoweight81
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 848
ACCEPTED MANUSCRIPT
7
changerdquo OR ldquobody mass indexrdquo OR ldquoBMIrdquo Hand-searching was conducted to identify82
additional studies Studies reported as withdrawn in the database and retrospective studies83
that preceded 1990 were excluded84
Study Selection85
Full term pregnancy was defined as 37 ndash 42 weeks gestation21
Women were classed as86
underweight normal overweight and obese category according to IOM criteria Countries87
were classified as lsquodevelopedrsquo or lsquodevelopingrsquo based on the United Nations criteria22
In88
relation to energy intake early and later pregnancy were defined by timepoints (t1 and t2) at89
least 12 or more weeks apart where t1 lt18 weeks and t2 gt30 weeks gestation (studies90
reporting data at intervals lt12 weeks were excluded) GWG was recorded as the mean plusmn SD91
where data was collected at lt18 weeks (t1) and gt34 weeks gestation (t2) except in 2 studies92
2324 where the value was calculated as the difference in weight at the 2 timepoints and the SD93
was calculated25
Studies published in a language other than English were excluded if a94
translation was not available In the RCT the control and intervention groups were analyzed95
as separate groups Efforts were made to contact authors for additional data regarding their96
respective studies97
Data extraction98
Data were independently extracted using standardized forms in the Excel spreadsheet which99
collected information on author title study type year published quality rating population100
characteristics (country age number of participants BMI parity) dietary collection method101
weeks gestation at time of data collection energy intake at two time points (t 1 and t2)102
macronutrient intake (g or energy) weight (t1 and t2) and GWG Data were cross-checked103
for accuracy and discrepancies resolved through discussion or involvement of a third party104
(JBM or JCYL)105
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 948
ACCEPTED MANUSCRIPT
8
Statistical analysis106
The primary outcome measures were standardized mean difference (SMD) in energy intake107
and GWG from early to late pregnancy Data were meta-analyzed collectively and stratified108
by developed and developing countries BMI (underweight normal overweight and obese)109
study design (observational and RCT) and dietary assessment methodology A random-effect110
model assumed heterogeneity among studies The Moodrsquos median test was used to test the111
equality of medians of SMD for energy intake and weight gain between developed and112
developing countries Because of small sample sizes within each BMI group the median113
GWG and interquartile range were used to assess mean weight gain compared to the IOM114
recommendations To calculate SMDs of mean weight gain between 2 timepoints (t1 and t2) a115
Spearman correlation coefficient of 085 was applied 26
Similarly for the 26 subgroups with116
reported energy intake at t1 and t2 a Spearman correlation coefficient of 074 was assumed For117
the studies which provided a range for weight rather than SD a value was imputed where r =118
085 Analyses were repeated using r = 08 or 09 and r = 07 or 08 for weight and energy119
respectively did not alter findings Data were analyzed using Comprehensive Meta-Analysis120
(CMA) package version 22 (Biostat Englewood New Jersey USA) and presented in the121
form of forest plots P-values of lt 001 were considered statistically significant as 7122
comparisons were made in this study including Body Mass Index countryrsquos economic status123
dietary collection method study type energy intake macronutrient distribution and124
gestational weight gain This was achieved using Bonferroni correction which divides the125
original P = 005 by the number of estimates made producing a new P-value = 0007 which126
was rounded to 001127
Assessment of Risk of Bias128
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1048
ACCEPTED MANUSCRIPT
9
Studies were individually assessed at a study level for bias and quality based on the Quality129
Criteria Checklist obtained from the American Dietetic Association Evidence Analysis130
Manual27
Only the studies which obtained a positive or neutral rating were included131
Publication bias was assessed by developing a funnel plot using standard difference in means132
and standard error as x and y-intercepts respectively133
RESULTS134
The electronic search revealed 2440 articles with a further 47 identified by hand-searching135
Of these 2301 did not meet inclusion criteria in the main because they did not report energy136
intake at 2 time points at least 12 weeks apart Three potential studies were excluded because137
of missing data28-30
The screening and selection process resulted in 18 studies of 2644138
women published between 1992 and 2013 (Figure 1) Fourteen studies were observational139
studies232431-42
most conducted in a representative population with a mean BMI in the140
normal range One study41
was in an overweight population and 1 study33
reported data by141
BMI category Of the 4 RCTs43-46
1 was an intervention in an overweight population44
and142
2 in an obese population4346
all aimed at limiting GWG One study45
had a population143
group with a mean BMI in the normal range with interventions comparing pregnancy144
outcomes on a low GI diet vs healthy eating advice145
Of the 18 studies that met inclusion criteria 2 obtained a positive quality rating and 16 were146
neutral (Table 1) Within studies the number of study participants ranged from 10 to 620147
with a mean (SD) age 296 (17) years and BMI 253 (49) kgm2 Seven studies had a148
retention rate of gt8232353638394145
6 ranged 63-78233134424346
1 of 5533
and 3 did149
not report243740
Sixteen subgroups reported total weeks gestation with an average of 396150
(043) weeks Only 6 studies reported parity mean = 18 (232) Dietary data was collected on151
average at 12 (26) weeks and 35 (21) weeks gestation The most frequent dietary collection152
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 448
ACCEPTED MANUSCRIPT
3
ABSTRACT
BACKGROUND Gestational weight gain within the recommended range produces optimal1
pregnancy outcomes yet many women exceed the guidelines Official recommendations to2
increase energy intake by ~ 1000 kJday in pregnancy may be excessive 3
OBJECTIVE To determine by meta-analysis of relevant studies whether greater increments4
in energy intake from early to late pregnancy corresponded to higher or excessive gestational5
weight gain6
DATA SOURCES We systematically searched electronic databases for observational and7
intervention studies published from 1990-present The databases included Ovid Medline8
Cochrane Library Excerpta Medica DataBASE (EMBASE) Cumulative Index to Nursing9
and Allied Health Literature (CINAHL) and Science Direct In addition we hand searched10
reference lists of all identified articles11
STUDY ELIGIBILITY CRIETRIA Studies were included if they reported gestational12
weight gain and energy intake in early and late gestation in women of any age with a13
singleton pregnancy Search also encompassed journals emerging from both developed and14
developing countries15
STUDY APPRAISAL AND SYNTHESIS METHDOS Studies were individually assessed16
for quality based on the Quality Criteria Checklist obtained from the American Dietetic17
Association Evidence Analysis Manual Publication bias was plotted using a funnel plot with18
standard mean difference against standard error Identified studies were meta-analyzed and19
stratified by Body Mass Index study design dietary methodology and country status20
(developeddeveloping) using a random-effects model21
RESULTS Of 2487 articles screened 18 studies met inclusion criteria On average women22
gained 120 (28) kg (Standardized Mean Difference = 1306 P lt 00005) yet reported only a23
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 548
ACCEPTED MANUSCRIPT
4
small increment in energy intake that did not reach statistical significance (~475 kJday24
Standard Mean Difference = 0266 P = 0016) Irrespective of baseline Body Mass Index25
study design dietary methodology or country status changes in energy intake were not26
significantly correlated to the amount of gestational weight gain (r = 0321 P = 011)27
CONCLUSION Despite rapid physiological weight gain women report little or no change28
in energy intake during pregnancy Current recommendations to increase energy intake by ~29
1000 kJday may therefore encourage excessive weight gain and adverse pregnancy30
outcomes31
KEYWORDS energy intake first trimester gestational weight gain pregnancy third32
trimester33
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 648
ACCEPTED MANUSCRIPT
5
INTRODUCTION34
In developed nations one third or more of women of childbearing age are overweight or35
obese1-3
Excessive pre-conception body weight is a recognized risk factor for adverse36
pregnancy outcomes including gestational diabetes mellitus (GDM) pregnancy-induced37
hypertension pre-eclampsia and caesarean delivery4 Maternal obesity is also linked with38
increased risk of macrosomia3 stillbirth
5 pre-term birth
6 and congenital malformation
739
Offspring of overweight and obese women are at increased risk of obesity in childhood and40
young adulthood thereby creating an intergenerational vicious cycle8-10
41
Restricting or optimizing gestational weight gain (GWG) is one of the few interventions that42
can reduce adverse pregnancy outcomes11
The Institute of Medicine (IOM) specifies ranges43
of desirable weight gain for underweight normal weight overweight and obese pregnant44
women that have been adopted by other countries12
However many pregnant women gain45
more than is optimal13
and find it difficult to lose the excess weight post-pregnancy14
46
A logical assumption is that additional food intake is required to achieve the desirable rate of47
weight gain in pregnancy Indeed mathematical models have been developed to determine48
the theoretical additional energy costs involved in pregnancy15
The cumulative absolute cost49
for women with a normal BMI and a mean GWG of 120 kg has been estimated to be ~32050
MJ distributed as an additional 0-300 kJday in the first trimester 1000-1500 kJday in the51
second and 1800-2100 kJday in the third16
Nonetheless energy requirements during52
pregnancy will be influenced by multiple factors including pre-pregnancy weight BMI53
maternal age stage of gestation rate of GWG and increases in energy expenditure relating to54
an increase in body mass and hence basal metabolic rate (BMR)1718
55
Despite the theory recent studies suggest that the current generation of women consume very56
little additional food energy to sustain a healthy pregnancy A meta-analysis of 23 studies in57
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 748
ACCEPTED MANUSCRIPT
6
well-nourished women reported an average increase of only ~140 kJday ie a small fraction58
of the theoretical calculation or current recommendations17
It is conceivable that pregnant59
women now require less energy than earlier generations due to reductions in incidental60
physical activity and increasing sedentariness19
Pregnancy guidelines that recommend an61
additional 2000 kJday in the third trimester may result in excessive GWG and adverse62
pregnancy outcomes63
In this analysis our objective was to determine whether a greater increment in reported64
energy intake from early to late pregnancy corresponded to higher or excessive GWG We65
systematically searched for observational and randomized controlled trials published over the66
past 25 years that reported GWG along with energy intake in early and late pregnancy67
METHODS68
Search Strategy69
A systematic literature search was undertaken in August-October 2014 by 2 independent70
student dietitians (JM and HJ) A starting date of 1990 was specified so that the outcomes71
reflected the current generation of women whose pregnancy advice may have been influenced72
by IOM guidelines20
We searched Ovid Medline Cochrane Library Excerpta Medica73
DataBASE (EMBASE) Cumulative Index to Nursing and Allied Health Literature74
(CINAHL) and Science Direct for studies that reported energy intake in early and late75
pregnancy and GWG in singleton pregnancies in women of any age Randomized controlled76
trials (RCT) and observational cohort and longitudinal studies were eligible for inclusion77
The following search terms were employed ldquopregnantrdquo OR ldquopregnancyrdquo OR ldquopregnant78
womanrdquo OR ldquogestationrdquo OR ldquomaternalrdquo AND ldquoenergy intakerdquo OR ldquomacronutrientrdquo OR79
ldquodietary fatrdquo OR ldquodietary proteinsrdquo OR ldquodietary carbohydraterdquo OR ldquodietary intakerdquo OR80
ldquocalorie intakerdquo OR ldquokilojoule intakerdquo AND ldquoweight gainrdquo OR ldquobody weightrdquo OR ldquoweight81
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 848
ACCEPTED MANUSCRIPT
7
changerdquo OR ldquobody mass indexrdquo OR ldquoBMIrdquo Hand-searching was conducted to identify82
additional studies Studies reported as withdrawn in the database and retrospective studies83
that preceded 1990 were excluded84
Study Selection85
Full term pregnancy was defined as 37 ndash 42 weeks gestation21
Women were classed as86
underweight normal overweight and obese category according to IOM criteria Countries87
were classified as lsquodevelopedrsquo or lsquodevelopingrsquo based on the United Nations criteria22
In88
relation to energy intake early and later pregnancy were defined by timepoints (t1 and t2) at89
least 12 or more weeks apart where t1 lt18 weeks and t2 gt30 weeks gestation (studies90
reporting data at intervals lt12 weeks were excluded) GWG was recorded as the mean plusmn SD91
where data was collected at lt18 weeks (t1) and gt34 weeks gestation (t2) except in 2 studies92
2324 where the value was calculated as the difference in weight at the 2 timepoints and the SD93
was calculated25
Studies published in a language other than English were excluded if a94
translation was not available In the RCT the control and intervention groups were analyzed95
as separate groups Efforts were made to contact authors for additional data regarding their96
respective studies97
Data extraction98
Data were independently extracted using standardized forms in the Excel spreadsheet which99
collected information on author title study type year published quality rating population100
characteristics (country age number of participants BMI parity) dietary collection method101
weeks gestation at time of data collection energy intake at two time points (t 1 and t2)102
macronutrient intake (g or energy) weight (t1 and t2) and GWG Data were cross-checked103
for accuracy and discrepancies resolved through discussion or involvement of a third party104
(JBM or JCYL)105
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 948
ACCEPTED MANUSCRIPT
8
Statistical analysis106
The primary outcome measures were standardized mean difference (SMD) in energy intake107
and GWG from early to late pregnancy Data were meta-analyzed collectively and stratified108
by developed and developing countries BMI (underweight normal overweight and obese)109
study design (observational and RCT) and dietary assessment methodology A random-effect110
model assumed heterogeneity among studies The Moodrsquos median test was used to test the111
equality of medians of SMD for energy intake and weight gain between developed and112
developing countries Because of small sample sizes within each BMI group the median113
GWG and interquartile range were used to assess mean weight gain compared to the IOM114
recommendations To calculate SMDs of mean weight gain between 2 timepoints (t1 and t2) a115
Spearman correlation coefficient of 085 was applied 26
Similarly for the 26 subgroups with116
reported energy intake at t1 and t2 a Spearman correlation coefficient of 074 was assumed For117
the studies which provided a range for weight rather than SD a value was imputed where r =118
085 Analyses were repeated using r = 08 or 09 and r = 07 or 08 for weight and energy119
respectively did not alter findings Data were analyzed using Comprehensive Meta-Analysis120
(CMA) package version 22 (Biostat Englewood New Jersey USA) and presented in the121
form of forest plots P-values of lt 001 were considered statistically significant as 7122
comparisons were made in this study including Body Mass Index countryrsquos economic status123
dietary collection method study type energy intake macronutrient distribution and124
gestational weight gain This was achieved using Bonferroni correction which divides the125
original P = 005 by the number of estimates made producing a new P-value = 0007 which126
was rounded to 001127
Assessment of Risk of Bias128
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1048
ACCEPTED MANUSCRIPT
9
Studies were individually assessed at a study level for bias and quality based on the Quality129
Criteria Checklist obtained from the American Dietetic Association Evidence Analysis130
Manual27
Only the studies which obtained a positive or neutral rating were included131
Publication bias was assessed by developing a funnel plot using standard difference in means132
and standard error as x and y-intercepts respectively133
RESULTS134
The electronic search revealed 2440 articles with a further 47 identified by hand-searching135
Of these 2301 did not meet inclusion criteria in the main because they did not report energy136
intake at 2 time points at least 12 weeks apart Three potential studies were excluded because137
of missing data28-30
The screening and selection process resulted in 18 studies of 2644138
women published between 1992 and 2013 (Figure 1) Fourteen studies were observational139
studies232431-42
most conducted in a representative population with a mean BMI in the140
normal range One study41
was in an overweight population and 1 study33
reported data by141
BMI category Of the 4 RCTs43-46
1 was an intervention in an overweight population44
and142
2 in an obese population4346
all aimed at limiting GWG One study45
had a population143
group with a mean BMI in the normal range with interventions comparing pregnancy144
outcomes on a low GI diet vs healthy eating advice145
Of the 18 studies that met inclusion criteria 2 obtained a positive quality rating and 16 were146
neutral (Table 1) Within studies the number of study participants ranged from 10 to 620147
with a mean (SD) age 296 (17) years and BMI 253 (49) kgm2 Seven studies had a148
retention rate of gt8232353638394145
6 ranged 63-78233134424346
1 of 5533
and 3 did149
not report243740
Sixteen subgroups reported total weeks gestation with an average of 396150
(043) weeks Only 6 studies reported parity mean = 18 (232) Dietary data was collected on151
average at 12 (26) weeks and 35 (21) weeks gestation The most frequent dietary collection152
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 548
ACCEPTED MANUSCRIPT
4
small increment in energy intake that did not reach statistical significance (~475 kJday24
Standard Mean Difference = 0266 P = 0016) Irrespective of baseline Body Mass Index25
study design dietary methodology or country status changes in energy intake were not26
significantly correlated to the amount of gestational weight gain (r = 0321 P = 011)27
CONCLUSION Despite rapid physiological weight gain women report little or no change28
in energy intake during pregnancy Current recommendations to increase energy intake by ~29
1000 kJday may therefore encourage excessive weight gain and adverse pregnancy30
outcomes31
KEYWORDS energy intake first trimester gestational weight gain pregnancy third32
trimester33
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 648
ACCEPTED MANUSCRIPT
5
INTRODUCTION34
In developed nations one third or more of women of childbearing age are overweight or35
obese1-3
Excessive pre-conception body weight is a recognized risk factor for adverse36
pregnancy outcomes including gestational diabetes mellitus (GDM) pregnancy-induced37
hypertension pre-eclampsia and caesarean delivery4 Maternal obesity is also linked with38
increased risk of macrosomia3 stillbirth
5 pre-term birth
6 and congenital malformation
739
Offspring of overweight and obese women are at increased risk of obesity in childhood and40
young adulthood thereby creating an intergenerational vicious cycle8-10
41
Restricting or optimizing gestational weight gain (GWG) is one of the few interventions that42
can reduce adverse pregnancy outcomes11
The Institute of Medicine (IOM) specifies ranges43
of desirable weight gain for underweight normal weight overweight and obese pregnant44
women that have been adopted by other countries12
However many pregnant women gain45
more than is optimal13
and find it difficult to lose the excess weight post-pregnancy14
46
A logical assumption is that additional food intake is required to achieve the desirable rate of47
weight gain in pregnancy Indeed mathematical models have been developed to determine48
the theoretical additional energy costs involved in pregnancy15
The cumulative absolute cost49
for women with a normal BMI and a mean GWG of 120 kg has been estimated to be ~32050
MJ distributed as an additional 0-300 kJday in the first trimester 1000-1500 kJday in the51
second and 1800-2100 kJday in the third16
Nonetheless energy requirements during52
pregnancy will be influenced by multiple factors including pre-pregnancy weight BMI53
maternal age stage of gestation rate of GWG and increases in energy expenditure relating to54
an increase in body mass and hence basal metabolic rate (BMR)1718
55
Despite the theory recent studies suggest that the current generation of women consume very56
little additional food energy to sustain a healthy pregnancy A meta-analysis of 23 studies in57
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 748
ACCEPTED MANUSCRIPT
6
well-nourished women reported an average increase of only ~140 kJday ie a small fraction58
of the theoretical calculation or current recommendations17
It is conceivable that pregnant59
women now require less energy than earlier generations due to reductions in incidental60
physical activity and increasing sedentariness19
Pregnancy guidelines that recommend an61
additional 2000 kJday in the third trimester may result in excessive GWG and adverse62
pregnancy outcomes63
In this analysis our objective was to determine whether a greater increment in reported64
energy intake from early to late pregnancy corresponded to higher or excessive GWG We65
systematically searched for observational and randomized controlled trials published over the66
past 25 years that reported GWG along with energy intake in early and late pregnancy67
METHODS68
Search Strategy69
A systematic literature search was undertaken in August-October 2014 by 2 independent70
student dietitians (JM and HJ) A starting date of 1990 was specified so that the outcomes71
reflected the current generation of women whose pregnancy advice may have been influenced72
by IOM guidelines20
We searched Ovid Medline Cochrane Library Excerpta Medica73
DataBASE (EMBASE) Cumulative Index to Nursing and Allied Health Literature74
(CINAHL) and Science Direct for studies that reported energy intake in early and late75
pregnancy and GWG in singleton pregnancies in women of any age Randomized controlled76
trials (RCT) and observational cohort and longitudinal studies were eligible for inclusion77
The following search terms were employed ldquopregnantrdquo OR ldquopregnancyrdquo OR ldquopregnant78
womanrdquo OR ldquogestationrdquo OR ldquomaternalrdquo AND ldquoenergy intakerdquo OR ldquomacronutrientrdquo OR79
ldquodietary fatrdquo OR ldquodietary proteinsrdquo OR ldquodietary carbohydraterdquo OR ldquodietary intakerdquo OR80
ldquocalorie intakerdquo OR ldquokilojoule intakerdquo AND ldquoweight gainrdquo OR ldquobody weightrdquo OR ldquoweight81
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 848
ACCEPTED MANUSCRIPT
7
changerdquo OR ldquobody mass indexrdquo OR ldquoBMIrdquo Hand-searching was conducted to identify82
additional studies Studies reported as withdrawn in the database and retrospective studies83
that preceded 1990 were excluded84
Study Selection85
Full term pregnancy was defined as 37 ndash 42 weeks gestation21
Women were classed as86
underweight normal overweight and obese category according to IOM criteria Countries87
were classified as lsquodevelopedrsquo or lsquodevelopingrsquo based on the United Nations criteria22
In88
relation to energy intake early and later pregnancy were defined by timepoints (t1 and t2) at89
least 12 or more weeks apart where t1 lt18 weeks and t2 gt30 weeks gestation (studies90
reporting data at intervals lt12 weeks were excluded) GWG was recorded as the mean plusmn SD91
where data was collected at lt18 weeks (t1) and gt34 weeks gestation (t2) except in 2 studies92
2324 where the value was calculated as the difference in weight at the 2 timepoints and the SD93
was calculated25
Studies published in a language other than English were excluded if a94
translation was not available In the RCT the control and intervention groups were analyzed95
as separate groups Efforts were made to contact authors for additional data regarding their96
respective studies97
Data extraction98
Data were independently extracted using standardized forms in the Excel spreadsheet which99
collected information on author title study type year published quality rating population100
characteristics (country age number of participants BMI parity) dietary collection method101
weeks gestation at time of data collection energy intake at two time points (t 1 and t2)102
macronutrient intake (g or energy) weight (t1 and t2) and GWG Data were cross-checked103
for accuracy and discrepancies resolved through discussion or involvement of a third party104
(JBM or JCYL)105
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 948
ACCEPTED MANUSCRIPT
8
Statistical analysis106
The primary outcome measures were standardized mean difference (SMD) in energy intake107
and GWG from early to late pregnancy Data were meta-analyzed collectively and stratified108
by developed and developing countries BMI (underweight normal overweight and obese)109
study design (observational and RCT) and dietary assessment methodology A random-effect110
model assumed heterogeneity among studies The Moodrsquos median test was used to test the111
equality of medians of SMD for energy intake and weight gain between developed and112
developing countries Because of small sample sizes within each BMI group the median113
GWG and interquartile range were used to assess mean weight gain compared to the IOM114
recommendations To calculate SMDs of mean weight gain between 2 timepoints (t1 and t2) a115
Spearman correlation coefficient of 085 was applied 26
Similarly for the 26 subgroups with116
reported energy intake at t1 and t2 a Spearman correlation coefficient of 074 was assumed For117
the studies which provided a range for weight rather than SD a value was imputed where r =118
085 Analyses were repeated using r = 08 or 09 and r = 07 or 08 for weight and energy119
respectively did not alter findings Data were analyzed using Comprehensive Meta-Analysis120
(CMA) package version 22 (Biostat Englewood New Jersey USA) and presented in the121
form of forest plots P-values of lt 001 were considered statistically significant as 7122
comparisons were made in this study including Body Mass Index countryrsquos economic status123
dietary collection method study type energy intake macronutrient distribution and124
gestational weight gain This was achieved using Bonferroni correction which divides the125
original P = 005 by the number of estimates made producing a new P-value = 0007 which126
was rounded to 001127
Assessment of Risk of Bias128
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1048
ACCEPTED MANUSCRIPT
9
Studies were individually assessed at a study level for bias and quality based on the Quality129
Criteria Checklist obtained from the American Dietetic Association Evidence Analysis130
Manual27
Only the studies which obtained a positive or neutral rating were included131
Publication bias was assessed by developing a funnel plot using standard difference in means132
and standard error as x and y-intercepts respectively133
RESULTS134
The electronic search revealed 2440 articles with a further 47 identified by hand-searching135
Of these 2301 did not meet inclusion criteria in the main because they did not report energy136
intake at 2 time points at least 12 weeks apart Three potential studies were excluded because137
of missing data28-30
The screening and selection process resulted in 18 studies of 2644138
women published between 1992 and 2013 (Figure 1) Fourteen studies were observational139
studies232431-42
most conducted in a representative population with a mean BMI in the140
normal range One study41
was in an overweight population and 1 study33
reported data by141
BMI category Of the 4 RCTs43-46
1 was an intervention in an overweight population44
and142
2 in an obese population4346
all aimed at limiting GWG One study45
had a population143
group with a mean BMI in the normal range with interventions comparing pregnancy144
outcomes on a low GI diet vs healthy eating advice145
Of the 18 studies that met inclusion criteria 2 obtained a positive quality rating and 16 were146
neutral (Table 1) Within studies the number of study participants ranged from 10 to 620147
with a mean (SD) age 296 (17) years and BMI 253 (49) kgm2 Seven studies had a148
retention rate of gt8232353638394145
6 ranged 63-78233134424346
1 of 5533
and 3 did149
not report243740
Sixteen subgroups reported total weeks gestation with an average of 396150
(043) weeks Only 6 studies reported parity mean = 18 (232) Dietary data was collected on151
average at 12 (26) weeks and 35 (21) weeks gestation The most frequent dietary collection152
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 648
ACCEPTED MANUSCRIPT
5
INTRODUCTION34
In developed nations one third or more of women of childbearing age are overweight or35
obese1-3
Excessive pre-conception body weight is a recognized risk factor for adverse36
pregnancy outcomes including gestational diabetes mellitus (GDM) pregnancy-induced37
hypertension pre-eclampsia and caesarean delivery4 Maternal obesity is also linked with38
increased risk of macrosomia3 stillbirth
5 pre-term birth
6 and congenital malformation
739
Offspring of overweight and obese women are at increased risk of obesity in childhood and40
young adulthood thereby creating an intergenerational vicious cycle8-10
41
Restricting or optimizing gestational weight gain (GWG) is one of the few interventions that42
can reduce adverse pregnancy outcomes11
The Institute of Medicine (IOM) specifies ranges43
of desirable weight gain for underweight normal weight overweight and obese pregnant44
women that have been adopted by other countries12
However many pregnant women gain45
more than is optimal13
and find it difficult to lose the excess weight post-pregnancy14
46
A logical assumption is that additional food intake is required to achieve the desirable rate of47
weight gain in pregnancy Indeed mathematical models have been developed to determine48
the theoretical additional energy costs involved in pregnancy15
The cumulative absolute cost49
for women with a normal BMI and a mean GWG of 120 kg has been estimated to be ~32050
MJ distributed as an additional 0-300 kJday in the first trimester 1000-1500 kJday in the51
second and 1800-2100 kJday in the third16
Nonetheless energy requirements during52
pregnancy will be influenced by multiple factors including pre-pregnancy weight BMI53
maternal age stage of gestation rate of GWG and increases in energy expenditure relating to54
an increase in body mass and hence basal metabolic rate (BMR)1718
55
Despite the theory recent studies suggest that the current generation of women consume very56
little additional food energy to sustain a healthy pregnancy A meta-analysis of 23 studies in57
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 748
ACCEPTED MANUSCRIPT
6
well-nourished women reported an average increase of only ~140 kJday ie a small fraction58
of the theoretical calculation or current recommendations17
It is conceivable that pregnant59
women now require less energy than earlier generations due to reductions in incidental60
physical activity and increasing sedentariness19
Pregnancy guidelines that recommend an61
additional 2000 kJday in the third trimester may result in excessive GWG and adverse62
pregnancy outcomes63
In this analysis our objective was to determine whether a greater increment in reported64
energy intake from early to late pregnancy corresponded to higher or excessive GWG We65
systematically searched for observational and randomized controlled trials published over the66
past 25 years that reported GWG along with energy intake in early and late pregnancy67
METHODS68
Search Strategy69
A systematic literature search was undertaken in August-October 2014 by 2 independent70
student dietitians (JM and HJ) A starting date of 1990 was specified so that the outcomes71
reflected the current generation of women whose pregnancy advice may have been influenced72
by IOM guidelines20
We searched Ovid Medline Cochrane Library Excerpta Medica73
DataBASE (EMBASE) Cumulative Index to Nursing and Allied Health Literature74
(CINAHL) and Science Direct for studies that reported energy intake in early and late75
pregnancy and GWG in singleton pregnancies in women of any age Randomized controlled76
trials (RCT) and observational cohort and longitudinal studies were eligible for inclusion77
The following search terms were employed ldquopregnantrdquo OR ldquopregnancyrdquo OR ldquopregnant78
womanrdquo OR ldquogestationrdquo OR ldquomaternalrdquo AND ldquoenergy intakerdquo OR ldquomacronutrientrdquo OR79
ldquodietary fatrdquo OR ldquodietary proteinsrdquo OR ldquodietary carbohydraterdquo OR ldquodietary intakerdquo OR80
ldquocalorie intakerdquo OR ldquokilojoule intakerdquo AND ldquoweight gainrdquo OR ldquobody weightrdquo OR ldquoweight81
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 848
ACCEPTED MANUSCRIPT
7
changerdquo OR ldquobody mass indexrdquo OR ldquoBMIrdquo Hand-searching was conducted to identify82
additional studies Studies reported as withdrawn in the database and retrospective studies83
that preceded 1990 were excluded84
Study Selection85
Full term pregnancy was defined as 37 ndash 42 weeks gestation21
Women were classed as86
underweight normal overweight and obese category according to IOM criteria Countries87
were classified as lsquodevelopedrsquo or lsquodevelopingrsquo based on the United Nations criteria22
In88
relation to energy intake early and later pregnancy were defined by timepoints (t1 and t2) at89
least 12 or more weeks apart where t1 lt18 weeks and t2 gt30 weeks gestation (studies90
reporting data at intervals lt12 weeks were excluded) GWG was recorded as the mean plusmn SD91
where data was collected at lt18 weeks (t1) and gt34 weeks gestation (t2) except in 2 studies92
2324 where the value was calculated as the difference in weight at the 2 timepoints and the SD93
was calculated25
Studies published in a language other than English were excluded if a94
translation was not available In the RCT the control and intervention groups were analyzed95
as separate groups Efforts were made to contact authors for additional data regarding their96
respective studies97
Data extraction98
Data were independently extracted using standardized forms in the Excel spreadsheet which99
collected information on author title study type year published quality rating population100
characteristics (country age number of participants BMI parity) dietary collection method101
weeks gestation at time of data collection energy intake at two time points (t 1 and t2)102
macronutrient intake (g or energy) weight (t1 and t2) and GWG Data were cross-checked103
for accuracy and discrepancies resolved through discussion or involvement of a third party104
(JBM or JCYL)105
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 948
ACCEPTED MANUSCRIPT
8
Statistical analysis106
The primary outcome measures were standardized mean difference (SMD) in energy intake107
and GWG from early to late pregnancy Data were meta-analyzed collectively and stratified108
by developed and developing countries BMI (underweight normal overweight and obese)109
study design (observational and RCT) and dietary assessment methodology A random-effect110
model assumed heterogeneity among studies The Moodrsquos median test was used to test the111
equality of medians of SMD for energy intake and weight gain between developed and112
developing countries Because of small sample sizes within each BMI group the median113
GWG and interquartile range were used to assess mean weight gain compared to the IOM114
recommendations To calculate SMDs of mean weight gain between 2 timepoints (t1 and t2) a115
Spearman correlation coefficient of 085 was applied 26
Similarly for the 26 subgroups with116
reported energy intake at t1 and t2 a Spearman correlation coefficient of 074 was assumed For117
the studies which provided a range for weight rather than SD a value was imputed where r =118
085 Analyses were repeated using r = 08 or 09 and r = 07 or 08 for weight and energy119
respectively did not alter findings Data were analyzed using Comprehensive Meta-Analysis120
(CMA) package version 22 (Biostat Englewood New Jersey USA) and presented in the121
form of forest plots P-values of lt 001 were considered statistically significant as 7122
comparisons were made in this study including Body Mass Index countryrsquos economic status123
dietary collection method study type energy intake macronutrient distribution and124
gestational weight gain This was achieved using Bonferroni correction which divides the125
original P = 005 by the number of estimates made producing a new P-value = 0007 which126
was rounded to 001127
Assessment of Risk of Bias128
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1048
ACCEPTED MANUSCRIPT
9
Studies were individually assessed at a study level for bias and quality based on the Quality129
Criteria Checklist obtained from the American Dietetic Association Evidence Analysis130
Manual27
Only the studies which obtained a positive or neutral rating were included131
Publication bias was assessed by developing a funnel plot using standard difference in means132
and standard error as x and y-intercepts respectively133
RESULTS134
The electronic search revealed 2440 articles with a further 47 identified by hand-searching135
Of these 2301 did not meet inclusion criteria in the main because they did not report energy136
intake at 2 time points at least 12 weeks apart Three potential studies were excluded because137
of missing data28-30
The screening and selection process resulted in 18 studies of 2644138
women published between 1992 and 2013 (Figure 1) Fourteen studies were observational139
studies232431-42
most conducted in a representative population with a mean BMI in the140
normal range One study41
was in an overweight population and 1 study33
reported data by141
BMI category Of the 4 RCTs43-46
1 was an intervention in an overweight population44
and142
2 in an obese population4346
all aimed at limiting GWG One study45
had a population143
group with a mean BMI in the normal range with interventions comparing pregnancy144
outcomes on a low GI diet vs healthy eating advice145
Of the 18 studies that met inclusion criteria 2 obtained a positive quality rating and 16 were146
neutral (Table 1) Within studies the number of study participants ranged from 10 to 620147
with a mean (SD) age 296 (17) years and BMI 253 (49) kgm2 Seven studies had a148
retention rate of gt8232353638394145
6 ranged 63-78233134424346
1 of 5533
and 3 did149
not report243740
Sixteen subgroups reported total weeks gestation with an average of 396150
(043) weeks Only 6 studies reported parity mean = 18 (232) Dietary data was collected on151
average at 12 (26) weeks and 35 (21) weeks gestation The most frequent dietary collection152
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 748
ACCEPTED MANUSCRIPT
6
well-nourished women reported an average increase of only ~140 kJday ie a small fraction58
of the theoretical calculation or current recommendations17
It is conceivable that pregnant59
women now require less energy than earlier generations due to reductions in incidental60
physical activity and increasing sedentariness19
Pregnancy guidelines that recommend an61
additional 2000 kJday in the third trimester may result in excessive GWG and adverse62
pregnancy outcomes63
In this analysis our objective was to determine whether a greater increment in reported64
energy intake from early to late pregnancy corresponded to higher or excessive GWG We65
systematically searched for observational and randomized controlled trials published over the66
past 25 years that reported GWG along with energy intake in early and late pregnancy67
METHODS68
Search Strategy69
A systematic literature search was undertaken in August-October 2014 by 2 independent70
student dietitians (JM and HJ) A starting date of 1990 was specified so that the outcomes71
reflected the current generation of women whose pregnancy advice may have been influenced72
by IOM guidelines20
We searched Ovid Medline Cochrane Library Excerpta Medica73
DataBASE (EMBASE) Cumulative Index to Nursing and Allied Health Literature74
(CINAHL) and Science Direct for studies that reported energy intake in early and late75
pregnancy and GWG in singleton pregnancies in women of any age Randomized controlled76
trials (RCT) and observational cohort and longitudinal studies were eligible for inclusion77
The following search terms were employed ldquopregnantrdquo OR ldquopregnancyrdquo OR ldquopregnant78
womanrdquo OR ldquogestationrdquo OR ldquomaternalrdquo AND ldquoenergy intakerdquo OR ldquomacronutrientrdquo OR79
ldquodietary fatrdquo OR ldquodietary proteinsrdquo OR ldquodietary carbohydraterdquo OR ldquodietary intakerdquo OR80
ldquocalorie intakerdquo OR ldquokilojoule intakerdquo AND ldquoweight gainrdquo OR ldquobody weightrdquo OR ldquoweight81
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 848
ACCEPTED MANUSCRIPT
7
changerdquo OR ldquobody mass indexrdquo OR ldquoBMIrdquo Hand-searching was conducted to identify82
additional studies Studies reported as withdrawn in the database and retrospective studies83
that preceded 1990 were excluded84
Study Selection85
Full term pregnancy was defined as 37 ndash 42 weeks gestation21
Women were classed as86
underweight normal overweight and obese category according to IOM criteria Countries87
were classified as lsquodevelopedrsquo or lsquodevelopingrsquo based on the United Nations criteria22
In88
relation to energy intake early and later pregnancy were defined by timepoints (t1 and t2) at89
least 12 or more weeks apart where t1 lt18 weeks and t2 gt30 weeks gestation (studies90
reporting data at intervals lt12 weeks were excluded) GWG was recorded as the mean plusmn SD91
where data was collected at lt18 weeks (t1) and gt34 weeks gestation (t2) except in 2 studies92
2324 where the value was calculated as the difference in weight at the 2 timepoints and the SD93
was calculated25
Studies published in a language other than English were excluded if a94
translation was not available In the RCT the control and intervention groups were analyzed95
as separate groups Efforts were made to contact authors for additional data regarding their96
respective studies97
Data extraction98
Data were independently extracted using standardized forms in the Excel spreadsheet which99
collected information on author title study type year published quality rating population100
characteristics (country age number of participants BMI parity) dietary collection method101
weeks gestation at time of data collection energy intake at two time points (t 1 and t2)102
macronutrient intake (g or energy) weight (t1 and t2) and GWG Data were cross-checked103
for accuracy and discrepancies resolved through discussion or involvement of a third party104
(JBM or JCYL)105
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 948
ACCEPTED MANUSCRIPT
8
Statistical analysis106
The primary outcome measures were standardized mean difference (SMD) in energy intake107
and GWG from early to late pregnancy Data were meta-analyzed collectively and stratified108
by developed and developing countries BMI (underweight normal overweight and obese)109
study design (observational and RCT) and dietary assessment methodology A random-effect110
model assumed heterogeneity among studies The Moodrsquos median test was used to test the111
equality of medians of SMD for energy intake and weight gain between developed and112
developing countries Because of small sample sizes within each BMI group the median113
GWG and interquartile range were used to assess mean weight gain compared to the IOM114
recommendations To calculate SMDs of mean weight gain between 2 timepoints (t1 and t2) a115
Spearman correlation coefficient of 085 was applied 26
Similarly for the 26 subgroups with116
reported energy intake at t1 and t2 a Spearman correlation coefficient of 074 was assumed For117
the studies which provided a range for weight rather than SD a value was imputed where r =118
085 Analyses were repeated using r = 08 or 09 and r = 07 or 08 for weight and energy119
respectively did not alter findings Data were analyzed using Comprehensive Meta-Analysis120
(CMA) package version 22 (Biostat Englewood New Jersey USA) and presented in the121
form of forest plots P-values of lt 001 were considered statistically significant as 7122
comparisons were made in this study including Body Mass Index countryrsquos economic status123
dietary collection method study type energy intake macronutrient distribution and124
gestational weight gain This was achieved using Bonferroni correction which divides the125
original P = 005 by the number of estimates made producing a new P-value = 0007 which126
was rounded to 001127
Assessment of Risk of Bias128
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1048
ACCEPTED MANUSCRIPT
9
Studies were individually assessed at a study level for bias and quality based on the Quality129
Criteria Checklist obtained from the American Dietetic Association Evidence Analysis130
Manual27
Only the studies which obtained a positive or neutral rating were included131
Publication bias was assessed by developing a funnel plot using standard difference in means132
and standard error as x and y-intercepts respectively133
RESULTS134
The electronic search revealed 2440 articles with a further 47 identified by hand-searching135
Of these 2301 did not meet inclusion criteria in the main because they did not report energy136
intake at 2 time points at least 12 weeks apart Three potential studies were excluded because137
of missing data28-30
The screening and selection process resulted in 18 studies of 2644138
women published between 1992 and 2013 (Figure 1) Fourteen studies were observational139
studies232431-42
most conducted in a representative population with a mean BMI in the140
normal range One study41
was in an overweight population and 1 study33
reported data by141
BMI category Of the 4 RCTs43-46
1 was an intervention in an overweight population44
and142
2 in an obese population4346
all aimed at limiting GWG One study45
had a population143
group with a mean BMI in the normal range with interventions comparing pregnancy144
outcomes on a low GI diet vs healthy eating advice145
Of the 18 studies that met inclusion criteria 2 obtained a positive quality rating and 16 were146
neutral (Table 1) Within studies the number of study participants ranged from 10 to 620147
with a mean (SD) age 296 (17) years and BMI 253 (49) kgm2 Seven studies had a148
retention rate of gt8232353638394145
6 ranged 63-78233134424346
1 of 5533
and 3 did149
not report243740
Sixteen subgroups reported total weeks gestation with an average of 396150
(043) weeks Only 6 studies reported parity mean = 18 (232) Dietary data was collected on151
average at 12 (26) weeks and 35 (21) weeks gestation The most frequent dietary collection152
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 848
ACCEPTED MANUSCRIPT
7
changerdquo OR ldquobody mass indexrdquo OR ldquoBMIrdquo Hand-searching was conducted to identify82
additional studies Studies reported as withdrawn in the database and retrospective studies83
that preceded 1990 were excluded84
Study Selection85
Full term pregnancy was defined as 37 ndash 42 weeks gestation21
Women were classed as86
underweight normal overweight and obese category according to IOM criteria Countries87
were classified as lsquodevelopedrsquo or lsquodevelopingrsquo based on the United Nations criteria22
In88
relation to energy intake early and later pregnancy were defined by timepoints (t1 and t2) at89
least 12 or more weeks apart where t1 lt18 weeks and t2 gt30 weeks gestation (studies90
reporting data at intervals lt12 weeks were excluded) GWG was recorded as the mean plusmn SD91
where data was collected at lt18 weeks (t1) and gt34 weeks gestation (t2) except in 2 studies92
2324 where the value was calculated as the difference in weight at the 2 timepoints and the SD93
was calculated25
Studies published in a language other than English were excluded if a94
translation was not available In the RCT the control and intervention groups were analyzed95
as separate groups Efforts were made to contact authors for additional data regarding their96
respective studies97
Data extraction98
Data were independently extracted using standardized forms in the Excel spreadsheet which99
collected information on author title study type year published quality rating population100
characteristics (country age number of participants BMI parity) dietary collection method101
weeks gestation at time of data collection energy intake at two time points (t 1 and t2)102
macronutrient intake (g or energy) weight (t1 and t2) and GWG Data were cross-checked103
for accuracy and discrepancies resolved through discussion or involvement of a third party104
(JBM or JCYL)105
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 948
ACCEPTED MANUSCRIPT
8
Statistical analysis106
The primary outcome measures were standardized mean difference (SMD) in energy intake107
and GWG from early to late pregnancy Data were meta-analyzed collectively and stratified108
by developed and developing countries BMI (underweight normal overweight and obese)109
study design (observational and RCT) and dietary assessment methodology A random-effect110
model assumed heterogeneity among studies The Moodrsquos median test was used to test the111
equality of medians of SMD for energy intake and weight gain between developed and112
developing countries Because of small sample sizes within each BMI group the median113
GWG and interquartile range were used to assess mean weight gain compared to the IOM114
recommendations To calculate SMDs of mean weight gain between 2 timepoints (t1 and t2) a115
Spearman correlation coefficient of 085 was applied 26
Similarly for the 26 subgroups with116
reported energy intake at t1 and t2 a Spearman correlation coefficient of 074 was assumed For117
the studies which provided a range for weight rather than SD a value was imputed where r =118
085 Analyses were repeated using r = 08 or 09 and r = 07 or 08 for weight and energy119
respectively did not alter findings Data were analyzed using Comprehensive Meta-Analysis120
(CMA) package version 22 (Biostat Englewood New Jersey USA) and presented in the121
form of forest plots P-values of lt 001 were considered statistically significant as 7122
comparisons were made in this study including Body Mass Index countryrsquos economic status123
dietary collection method study type energy intake macronutrient distribution and124
gestational weight gain This was achieved using Bonferroni correction which divides the125
original P = 005 by the number of estimates made producing a new P-value = 0007 which126
was rounded to 001127
Assessment of Risk of Bias128
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1048
ACCEPTED MANUSCRIPT
9
Studies were individually assessed at a study level for bias and quality based on the Quality129
Criteria Checklist obtained from the American Dietetic Association Evidence Analysis130
Manual27
Only the studies which obtained a positive or neutral rating were included131
Publication bias was assessed by developing a funnel plot using standard difference in means132
and standard error as x and y-intercepts respectively133
RESULTS134
The electronic search revealed 2440 articles with a further 47 identified by hand-searching135
Of these 2301 did not meet inclusion criteria in the main because they did not report energy136
intake at 2 time points at least 12 weeks apart Three potential studies were excluded because137
of missing data28-30
The screening and selection process resulted in 18 studies of 2644138
women published between 1992 and 2013 (Figure 1) Fourteen studies were observational139
studies232431-42
most conducted in a representative population with a mean BMI in the140
normal range One study41
was in an overweight population and 1 study33
reported data by141
BMI category Of the 4 RCTs43-46
1 was an intervention in an overweight population44
and142
2 in an obese population4346
all aimed at limiting GWG One study45
had a population143
group with a mean BMI in the normal range with interventions comparing pregnancy144
outcomes on a low GI diet vs healthy eating advice145
Of the 18 studies that met inclusion criteria 2 obtained a positive quality rating and 16 were146
neutral (Table 1) Within studies the number of study participants ranged from 10 to 620147
with a mean (SD) age 296 (17) years and BMI 253 (49) kgm2 Seven studies had a148
retention rate of gt8232353638394145
6 ranged 63-78233134424346
1 of 5533
and 3 did149
not report243740
Sixteen subgroups reported total weeks gestation with an average of 396150
(043) weeks Only 6 studies reported parity mean = 18 (232) Dietary data was collected on151
average at 12 (26) weeks and 35 (21) weeks gestation The most frequent dietary collection152
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 948
ACCEPTED MANUSCRIPT
8
Statistical analysis106
The primary outcome measures were standardized mean difference (SMD) in energy intake107
and GWG from early to late pregnancy Data were meta-analyzed collectively and stratified108
by developed and developing countries BMI (underweight normal overweight and obese)109
study design (observational and RCT) and dietary assessment methodology A random-effect110
model assumed heterogeneity among studies The Moodrsquos median test was used to test the111
equality of medians of SMD for energy intake and weight gain between developed and112
developing countries Because of small sample sizes within each BMI group the median113
GWG and interquartile range were used to assess mean weight gain compared to the IOM114
recommendations To calculate SMDs of mean weight gain between 2 timepoints (t1 and t2) a115
Spearman correlation coefficient of 085 was applied 26
Similarly for the 26 subgroups with116
reported energy intake at t1 and t2 a Spearman correlation coefficient of 074 was assumed For117
the studies which provided a range for weight rather than SD a value was imputed where r =118
085 Analyses were repeated using r = 08 or 09 and r = 07 or 08 for weight and energy119
respectively did not alter findings Data were analyzed using Comprehensive Meta-Analysis120
(CMA) package version 22 (Biostat Englewood New Jersey USA) and presented in the121
form of forest plots P-values of lt 001 were considered statistically significant as 7122
comparisons were made in this study including Body Mass Index countryrsquos economic status123
dietary collection method study type energy intake macronutrient distribution and124
gestational weight gain This was achieved using Bonferroni correction which divides the125
original P = 005 by the number of estimates made producing a new P-value = 0007 which126
was rounded to 001127
Assessment of Risk of Bias128
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1048
ACCEPTED MANUSCRIPT
9
Studies were individually assessed at a study level for bias and quality based on the Quality129
Criteria Checklist obtained from the American Dietetic Association Evidence Analysis130
Manual27
Only the studies which obtained a positive or neutral rating were included131
Publication bias was assessed by developing a funnel plot using standard difference in means132
and standard error as x and y-intercepts respectively133
RESULTS134
The electronic search revealed 2440 articles with a further 47 identified by hand-searching135
Of these 2301 did not meet inclusion criteria in the main because they did not report energy136
intake at 2 time points at least 12 weeks apart Three potential studies were excluded because137
of missing data28-30
The screening and selection process resulted in 18 studies of 2644138
women published between 1992 and 2013 (Figure 1) Fourteen studies were observational139
studies232431-42
most conducted in a representative population with a mean BMI in the140
normal range One study41
was in an overweight population and 1 study33
reported data by141
BMI category Of the 4 RCTs43-46
1 was an intervention in an overweight population44
and142
2 in an obese population4346
all aimed at limiting GWG One study45
had a population143
group with a mean BMI in the normal range with interventions comparing pregnancy144
outcomes on a low GI diet vs healthy eating advice145
Of the 18 studies that met inclusion criteria 2 obtained a positive quality rating and 16 were146
neutral (Table 1) Within studies the number of study participants ranged from 10 to 620147
with a mean (SD) age 296 (17) years and BMI 253 (49) kgm2 Seven studies had a148
retention rate of gt8232353638394145
6 ranged 63-78233134424346
1 of 5533
and 3 did149
not report243740
Sixteen subgroups reported total weeks gestation with an average of 396150
(043) weeks Only 6 studies reported parity mean = 18 (232) Dietary data was collected on151
average at 12 (26) weeks and 35 (21) weeks gestation The most frequent dietary collection152
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1048
ACCEPTED MANUSCRIPT
9
Studies were individually assessed at a study level for bias and quality based on the Quality129
Criteria Checklist obtained from the American Dietetic Association Evidence Analysis130
Manual27
Only the studies which obtained a positive or neutral rating were included131
Publication bias was assessed by developing a funnel plot using standard difference in means132
and standard error as x and y-intercepts respectively133
RESULTS134
The electronic search revealed 2440 articles with a further 47 identified by hand-searching135
Of these 2301 did not meet inclusion criteria in the main because they did not report energy136
intake at 2 time points at least 12 weeks apart Three potential studies were excluded because137
of missing data28-30
The screening and selection process resulted in 18 studies of 2644138
women published between 1992 and 2013 (Figure 1) Fourteen studies were observational139
studies232431-42
most conducted in a representative population with a mean BMI in the140
normal range One study41
was in an overweight population and 1 study33
reported data by141
BMI category Of the 4 RCTs43-46
1 was an intervention in an overweight population44
and142
2 in an obese population4346
all aimed at limiting GWG One study45
had a population143
group with a mean BMI in the normal range with interventions comparing pregnancy144
outcomes on a low GI diet vs healthy eating advice145
Of the 18 studies that met inclusion criteria 2 obtained a positive quality rating and 16 were146
neutral (Table 1) Within studies the number of study participants ranged from 10 to 620147
with a mean (SD) age 296 (17) years and BMI 253 (49) kgm2 Seven studies had a148
retention rate of gt8232353638394145
6 ranged 63-78233134424346
1 of 5533
and 3 did149
not report243740
Sixteen subgroups reported total weeks gestation with an average of 396150
(043) weeks Only 6 studies reported parity mean = 18 (232) Dietary data was collected on151
average at 12 (26) weeks and 35 (21) weeks gestation The most frequent dietary collection152
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1148
ACCEPTED MANUSCRIPT
10
method was a weighed or estimated food record (n = 18) but 3 studies used a food diary 2153
employed repeat 24-hr recall and 2 used a diet history Characteristics of the included studies154
are summarized in Table 2155
Mean reported energy intake in the 18 studies was 8130 (1100) kJday and 8600 (1230)156
kJday in early and late pregnancy respectively The SMD between the 2 was 0266 ( P = 157
0016) a difference equivalent to ~475 kJday which did not reach the a priori level of158
significance (P = 001) (Figure 2) The mean GWG was 120 (28) kg representing a large159
statistically significant increase (SMD = 1306 P lt 00005) (Figure 3) However there was160
no correlation between mean incremental energy intake and GWG (Figure 4A r = 0321 P161
= 011) Only 1 study36
(18 women BMI 217 (3) kgm2) reported a mean increase in energy162
intake in line with pregnancy guidelines ie 1700 kJday (GWG 114 (37) kg)163
When comparing studies from developing (SMD = 0715 P = 0156 n = 4) and developed164
countries (SMD = 0175 P = 0010 n = 22) the change in energy intake did not reach165
statistical level of significance (P = 0277 Moodrsquos median Test) Similarly when comparing166
change in weight in both developed (SMD = 1310 P lt 00005 n = 22) and developing167
countries (SMD = 1297 P lt 00005 n = 4) the difference did not reach statistical168
significance (P = 1000 Mood Median Test)169
There was no difference in incremental energy intake across BMI groupings including obese170
(SMD = 0083 P = 0611 n = 5) underweight (SMD = 0103 P = 0421 n = 1) normal171
(SMD = 0314 P = 0033 n = 16) and overweight (SMD = 0378 P = 0019 n = 4) groups172
In contrast GWG differed significantly among the BMI groups with a downward trend in173
weight gain as BMI increased The largest effect was seen in the underweight group (SMD =174
1658 P lt 00005 n = 1) followed by normal weight (SMD = 1448 P lt 00005 n = 16)175
and overweight (SMD = 1245 P lt 00005 n = 4) The smallest GWG was seen in the obese176
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1248
ACCEPTED MANUSCRIPT
11
women (SMD = 00845 P lt 00005 n = 5) where all interventions were aimed at reducing177
GWG Despite this the inverse relationship between mean BMI and GWG did not reach178
statistical significance (Figure 4B r = -0363 P = 0068)179
Regardless of mean BMI mean weight gain remained within the range of 10 to 16 kg for the180
majority of studies Comparing GWG to IOM recommendations 1 study population181
classified as underweight did not meet the IOM recommendation of 125-18 kg12
with a182
mean weight gain of 109 kg Nine of 16 studies with a mean BMI in the normal range met183
IOM recommendations for GWG of 115 to 155 kg12
(IQR 113 to 148 kg median 131 kg)184
Two studies exceeded the range 4 studies fell short (102 to 114 kg) and 1 study was far185
below recommendations (61 kg) For overweight women only 1 study met the guidelines of186
a 65 to 115 kg gain12
1 fell short and the remaining 2 studies had a mean weight gain187
exceeding recommendations (IQR 77 to 142 kg median 127 kg) Of the 5 studies in obese188
populations 1 study fell within the guidelines of 50 to 90 kg12
the other 4 exceeded189
recommendations with a mean gain of 98 to 113 kg (IQR 82 to 121 kg median 106 kg)190
Comparing study types RCT showed a lower SMD in energy intake (SMD = 0081 P = 191
0354 n = 9) than observational studies (SMD = 0361 P = 0017 n = 17) but the difference192
was non-significant SMD for weight gain showed a large effect for both study types with193
RCTs showing a lower effect (SMD = 1090 P lt 00005 n = 9) than observational studies194
(SMD = 1431 P lt 00005 n = 17)195
Only when energy intake was assessed with diet history (SMD = 0481 P = 0006 n = 2) an196
increase in intake was observed Neither food records (SMD = 0181 P = 0015 n = 18) nor197
24 hour recalls (SMD = 1024 P = 0204 n = 2) were able to demonstrate a change in energy198
intake Interestingly studies using a food diary or photographs (n = 3) revealed a decrease in199
energy intake from early to late pregnancy (SMD = -0047 P = 0452 n = 3) although did not200
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1348
ACCEPTED MANUSCRIPT
12
reach statistical significance When analyzed according to macronutrient distribution (201
energy) there was a small but significant increase in carbohydrate intake between early and202
late pregnancy (SMD = 013 P = 0006) but no significant effect on fat or protein intake203
Risk of Bias of Included Studies204
A funnel plot (Figure 5) was produced with an almost even distribution of points to the left205
and right of the solid vertical line in the figure In addition Begg and Mazumdarrsquos rank206
correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos regression intercept was207
0528 (two-tailed P-value = 0826) which suggests that there is no publication bias in our208
meta-analysis209
COMMENT210
To our knowledge this is the first study to use meta-analysis to explore the relationship211
between changes in food energy intake in pregnancy and maternal weight gain In a212
comprehensive body of literature from developed and developing countries we found no213
relationship between the increment in energy intake from early to late pregnancy and the214
amount of GWG Indeed despite a large highly significant increase in body weight (+120215
kg) there was only a small non-significant increase in reported energy intake (+475 kJday)216
The findings were similar when the intervention arms of the RCT were removed from the217
meta-analysis The average energy intake increment was slightly higher (~650 kJday P =218
0009) but still much lower than the theoretical requirement of 14-19 MJday Furthermore219
weight gain in this sub-group was almost identical to the bigger cohort (+121 kg)220
Others have reported little or no difference in energy intake between pre-pregnancyearly221
pregnancy and late pregnancy47-49
A recently published longitudinal study by Abeysekera222
and colleagues 49 also found that energy intake did not differ between any trimester of223
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1448
ACCEPTED MANUSCRIPT
13
pregnancy On the other hand a review of 9 prospective studies from a previous generation224
of women (1971-1993)50
reported a mean increase in energy of 300 kJday comparable to225
the present analysis and also well below recommendations for pregnancy16
Unlike the226
present study however the rise in energy intake was not investigated in the light of GWG227
1617 While Streuling et al
11 conducted a systematic review of the literature they did not228
apply meta-analysis to either energy intake or GWG229
It is possible of course that underreporting of food intake explains our findings Higher230
levels of underreporting are more likely among those with a higher BMI and lower education231
levels4751
However underreporting is lower in pregnant women than in the general232
population with recorded rates of 11-33 in the first trimester 16 in the second and 18233
in the third4751
Higher rates during the first trimester may be due to inadequate dietary234
intake as a result of nausea and vomiting that commonly accompanies early gestation rather235
than underreporting itself47
This phenomenon however would inflate the difference in236
energy intake between early and late pregnancy237
We found that studies from developing countries had a higher increment in energy intake238
than those from developed countries although the difference was not significant A potential239
source of between-study variation is the dietary methodology Indeed it is well recognized240
that Food Frequency Questionnaires (FFQs) usually generate higher energy intake than241
dietary record estimates52 Individuals are also likely to alter food intake during their data242
collection period53
In our meta-analysis food records were the predominant dietary243
collection tool when compared to diet history and food diaries making it impossible to draw244
conclusions on the extent of under-reporting for each dietary assessment tool245
The lack of correlation between additional energy intake and GWG suggests that factors246
other than additional food intake may be responsible for the physiological weight gain of247
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1548
ACCEPTED MANUSCRIPT
14
pregnancy Well-designed studies using objective methodology under free-living conditions248
indicate that women markedly reduce energy expenditure as pregnancy progresses Energy249
savings of ~900 kJday have been documented19
with a reduction in physical activity level250
(PAL) from 19 to 17 in developing (62) and PAL 18 to 16 in developed countries19
This251
is achieved by a shift towards less vigorous activities and greater sedentary time1954
thereby252
counterbalancing a higher BMR55
With up to 60 of the present generation of pregnant253
women already inactive prior to conception54
and greater proportions beginning pregnancy254
overweight or obese declining physical activity and increasing sedentary behavior not255
higher food intake may explain the positive energy deposition of pregnancy256
Studies have also shown that metabolic and behavioral adaptations occur during pregnancy at257
varying levels of pre-pregnancy nutrition Gambian women display a decreased BMR and258
energy sparing adaptations early in pregnancy to allow for weight gain despite severe under-259
nutrition50
Leptin and insulin are important regulators of food intake and energy balance and260
may influence GWG Insulin resistance and leptin concentration increase as pregnancy261
progresses5657
There is a strong positive correlation between BMI and first and third262
trimester insulin and leptin concentrations41
with GWG increasing as baseline leptin263
concentrations rise57
Women with a normal pre-pregnancy BMI and elevated plasma leptin264
concentrations at baseline are predisposed to greater GWG57
265
Although our search strategy revealed almost 2500 potentially relevant studies the majority266
report energy intake at only one time point They are therefore unable to capture the change267
in energy intake or determine the relationship with weight gain over time Hence any single268
measurement may reflect a high pre-pregnancy energy intake rather than an absolute increase269
during pregnancy270
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1648
ACCEPTED MANUSCRIPT
15
This study has strengths and limitations Strict inclusionexclusion criteria resulted in two271
large pregnancy studies being excluded The Danish Health Cohort58
(n = 47003) and272
Nursesrsquo Health Study II59
(n = 13110) were excluded as dietary data were collected at one273
time point only Most studies were observational in nature and therefore susceptible to the274
effects of bias and confounding as well as the potential for measurement error and under or275
over reporting of dietary intake Effects were minimized by conducting an independent276
assessment of study quality stratifying data according to dietary collection method and study277
type and using the random-effect model in statistical analysis to assume heterogeneity In278
addition only articles published after 1990 were included as they were deemed more279
applicable to current context of high prevalence of overweight and obesity at the time of280
conception281
An important implication of our study is that the current generation of women are unlikely to282
meet the increased micronutrient requirements that are dictated by a growing fetus If dietary283
energy intake is not increased then iron calcium iodine folic acid and other critical284
nutrients will be ingested at levels similar to pre-pregnancy48
Our findings have important285
clinical implications for dietary advice for pregnancy with little or no emphasis on increasing286
food intake and more emphasis on higher dietary quality with richer micronutrient287
composition and recommended supplement use Strict adherence to current energy guidelines288
for pregnancy (+1100 kJday) could well result in excessive GWG with potentially adverse289
consequences for maternal and offspring health These findings call for more case cohort290
studies to evaluate the effect of a reduction of energy intake on gestational weight gain and291
pregnancy outcomes292
CONCLUSIONS 293
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1748
ACCEPTED MANUSCRIPT
16
Despite a period of uniquely rapid weight gain women appear to consume only one quarter294
of the theoretical requirement for additional energy (2000 kJday in trimester 3) during295
pregnancy Given the high prevalence of obesity and excessive GWG in the current296
generation of women of reproductive age dietary guidelines for pregnancy may need to be297
revised298
Acknowledgements299
This research project was undertaken by two students JM and HJ as part of their300
MNUTRDIET degree with special thanks to TP for her work on statistical analysis and to301
supervisors JCYL and JBM for their time guidance and overall contribution in this research302
project303
Authorsrsquo contribution304
JCYL and JBM conceptualized the meta-analysis JM and HJ developed the search strategy305
under the guidance of JCYL and JCBM JM and HJ carried out the systematic search306
screened and reviewed the articles and extracted the data from the included studies JCYL307
and JBM acted as an adjudicating reviewer when required TP performed the meta-analysis308
All authors were involved in the interpretation of the data HJ and JM drafted the manuscript309
All authors have substantial input into the subsequent edits of the manuscript and have read310
and approved the final manuscript311
Conflict of Interest312
The authors declare they have no conflict of interest313
Funding314
The authors received no financial support for the research or authorship of this article315
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1848
ACCEPTED MANUSCRIPT
18
REFERENCES
1 D983137983158983145983155 E 983119983148983155983151983150 C 983119983138983141983155983145983156983161 983145983150 983120983154983141983143983150983137983150983139983161 983120983154983145983149983137983154983161 983107983137983154983141 983107983148983145983150983145983139983155 983145983150 983119983142983142983145983139983141 983120983154983137983139983156983145983139983141
200936(2)341983085356
2 C983144983157 983123983129 K983145983149 983123983129 B983145983155983144 CL 983120983154983141983152983154983141983143983150983137983150983139983161 983151983138983141983155983145983156983161 983152983154983141983158983137983148983141983150983139983141 983145983150 983156983144983141 983125983150983145983156983141983140 983123983156983137983156983141983155 20049830852005
983117983137983156983141983154983150983137983148 983137983150983140 983139983144983145983148983140 983144983141983137983148983156983144 983146983151983157983154983150983137983148 200913(5)614983085620
3 983119983158983141983155983141983150 983120 983122983137983155983149983157983155983155983141983150 983123 K983141983155983149983151983140983141983148 983125 E983142983142983141983139983156 983151983142 983152983154983141983152983154983141983143983150983137983150983139983161 983149983137983156983141983154983150983137983148 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983151983150 983152983154983141983143983150983137983150983139983161 983151983157983156983139983151983149983141 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161 2011118(2 983120983156 1)305983085312
4 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 B983141983139983147983141983154983155 K 983126983137983150983155983137983150983156 G M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983152983154983141983143983150983137983150983139983161 983139983151983149983152983148983145983139983137983156983145983151983150983155
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983150983157983156983154983145983156983145983151983150 983119983138983141983155983145983156983161 983154983141983158983145983141983159983155 983137983150 983151983142983142983145983139983145983137983148 983146983151983157983154983150983137983148 983151983142 983156983144983141 983113983150983156983141983154983150983137983156983145983151983150983137983148
983105983155983155983151983139983145983137983156983145983151983150 983142983151983154 983156983144983141 983123983156983157983140983161 983151983142 983119983138983141983155983145983156983161 20089(2)140983085150
5 C983150983137983156983156983145983150983143983145983157983155 983123 B983141983154983143983155983156983154983286983149 983122 L983145983152983159983151983154983156983144 L 983141983156 983137983148 983120983154983141983152983154983141983143983150983137983150983139983161 983127983141983145983143983144983156 983137983150983140 983156983144983141 983122983145983155983147 983151983142 A983140983158983141983154983155983141
983120983154983141983143983150983137983150983139983161 983119983157983156983139983151983149983141983155 983124983144983141 983118983141983159 983109983150983143983148983137983150983140 983146983151983157983154983150983137983148 983151983142 983149983141983140983145983139983145983150983141 1998338(3)147983085152
6 983120983141983154983155983155983151983150 M B983151983150983137983149983161 A983085KE C983150983137983156983156983145983150983143983145983157983155 983123 983141983156 983137983148 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 983122983145983155983147 983151983142 983120983154983141983156983141983154983149
D983141983148983145983158983141983154983161 983114983105983117983105 2013309(22)23629830852370
7 983123983156983151983156983144983137983154983140 KJ 983124983141983150983150983137983150983156 983120983127G B983141983148983148 983122 M983137983156983141983154983150983137983148 983119983158983141983154983159983141983145983143983144983156 983137983150983140 983119983138983141983155983145983156983161 983137983150983140 983156983144983141 983122983145983155983147 983151983142
C983151983150983143983141983150983145983156983137983148 A983150983151983149983137983148983145983141983155 A 983123983161983155983156983141983149983137983156983145983139 983122983141983158983145983141983159 983137983150983140 M983141983156983137983085983137983150983137983148983161983155983145983155 983114983105983117983105 983131983112983127983127983145983148983155983151983150 983085 983111983123983133
2009301(6)636
8 B983157983140983143983141 H G983150983137983150983137983148983145983150983143983144983137983149 MG G983137983154983140983150983141983154 D983123 M983151983155983156983161983150 A 983123983156983141983152983144983141983150983155983151983150 983124 983123983161983149983151983150983140983155 ME M983137983156983141983154983150983137983148
983150983157983156983154983145983156983145983151983150983137983148 983152983154983151983143983154983137983149983149983145983150983143 983151983142 983142983141983156983137983148 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983140983141983158983141983148983151983152983149983141983150983156 983148983151983150983143983085983156983141983154983149 983139983151983150983155983141983153983157983141983150983139983141983155 983142983151983154
983148983137983156983141983154 983151983138983141983155983145983156983161 983106983145983154983156983144 983140983141983142983141983139983156983155 983154983141983155983141983137983154983139983144 983120983137983154983156 983107 983109983149983138983154983161983151 983156983151983140983137983161 983154983141983158983145983141983159983155 200575(3)193983085199
9 C983137983148983148983137983159983137983161 LK 983120983154983145983150983155 JB C983144983137983150983143 AM M983139I983150983156983161983154983141 HD 983124983144983141 983152983154983141983158983137983148983141983150983139983141 983137983150983140 983145983149983152983137983139983156 983151983142 983151983158983141983154983159983141983145983143983144983156 983137983150983140
983151983138983141983155983145983156983161 983145983150 983137983150 A983157983155983156983154983137983148983145983137983150 983151983138983155983156983141983156983154983145983139 983152983151983152983157983148983137983156983145983151983150 983124983144983141 983117983141983140983145983139983137983148 983146983151983157983154983150983137983148 983151983142 983105983157983155983156983154983137983148983145983137
2006184(2)56
10 B983151983150983141983161 CM 983126983141983154983149983137 A 983124983157983139983147983141983154 983122 983126983151983144983154 B983122 M983141983156983137983138983151983148983145983139 983123983161983150983140983154983151983149983141 983145983150 C983144983145983148983140983144983151983151983140 A983155983155983151983139983145983137983156983145983151983150 983127983145983156983144
B983145983154983156983144 983127983141983145983143983144983156 M983137983156983141983154983150983137983148 983119983138983141983155983145983156983161 983137983150983140 G983141983155983156983137983156983145983151983150983137983148 D983145983137983138983141983156983141983155 M983141983148983148983145983156983157983155 983120983141983140983145983137983156983154983145983139983155
2005115(3)983141290983085983141296
11 983123983156983154983141983157983148983145983150983143 I B983141983161983141983154983148983141983145983150 A 983122983151983155983141983150983142983141983148983140 E 983123983139983144983157983147983137983156 B 983158983151983150 K983154983145983141983155 983122 983127983141983145983143983144983156 983143983137983145983150 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141
983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983145983150983140983157983155983156983154983145983137983148983145983162983141983140 983139983151983157983150983156983154983145983141983155983085983085983137 983155983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983151983142 983151983138983155983141983154983158983137983156983145983151983150983137983148 983155983156983157983140983145983141983155
983114983151983157983154983150983137983148 983151983142 983120983141983154983145983150983137983156983137983148 983117983141983140983145983139983145983150983141 201139(2)123983085129
12 983122983137983155983149983157983155983155983141983150 KM 983129A 983127983141983145983143983144983156 983111983137983145983150 983108983157983154983145983150983143 983120983154983141983143983150983137983150983139983161 983122983141983141983160983137983149983145983150983145983150983143 983156983144983141 983111983157983145983140983141983148983145983150983141983155 2009 I983123BN983085
13 9789830850983085309983085131139830851
13 983119D983159983161983141983154 983126 983119983124983151983151983148983141 F D983137983154983139983161 983123 F983137983154983137983144 N K983141983150983150983141983148983148983161 MM 983124983157983154983150983141983154 MJ M983137983156983141983154983150983137983148 983151983138983141983155983145983156983161 983137983150983140
983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983137983141983139983151983148983151983143983161 201333(7)671983085674
14 983122983151983151983150983141983161 BL 983123983139983144983137983157983138983141983154983143983141983154 C983127 E983160983139983141983155983155 983152983154983141983143983150983137983150983139983161 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983148983151983150983143983085983156983141983154983149 983151983138983141983155983145983156983161 983151983150983141
983140983141983139983137983140983141 983148983137983156983141983154 983119983138983155983156983141983156983154983145983139983155 amp 983111983161983150983141983139983151983148983151983143983161 2002100(2)245983085252
15 H983161983156983156983141983150 FE L983141983145983156983139983144 I 983124983144983141 983152983144983161983155983145983151983148983151983143983161 983151983142 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983119983160983142983151983154983140 B983148983137983139983147983159983141983148983148 983123983139983145983141983150983156983145983142983145983139 1971
16 B983157983156983156983141 NF K983145983150983143 JC E983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983120983157983138983148983145983139 983112983141983137983148983156983144
983118983157983156983154983145983156983145983151983150 20058(7A)10109830851027
17 B983148983157983149983142983145983141983148983140 ML H983157983154983141 AJ M983137983139983140983151983150983137983148983140983085983127983145983139983147983155 L 983123983149983145983156983144 983122 C983151983148983148983145983150983155 CE 983123983161983155983156983141983149983137983156983145983139 983154983141983158983145983141983159 983137983150983140 983149983141983156983137983085
983137983150983137983148983161983155983145983155 983151983142 983141983150983141983154983143983161 983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983145983150 983140983141983158983141983148983151983152983141983140 983139983151983157983150983156983154983145983141983155
983118983157983156983154983145983156983145983151983150 983154983141983158983145983141983159983155 201270(6)322983085336
18 983125983150983145983156983141983140 N983137983156983145983151983150983155 983125 983127983151983154983148983140 H983141983137983148983156983144 983119 F983151983151983140 A983143983154983145983139983157983148983156983157983154983141 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N 983112983157983149983137983150
983141983150983141983154983143983161 983154983141983153983157983145983154983141983149983141983150983156983155 983154983141983152983151983154983156 983151983142 983137 983114983151983145983150983156 983110983105983119983127983112983119983125983118983125 983109983160983152983141983154983156 983107983151983150983155983157983148983156983137983156983145983151983150 983122983151983149983141 1798308524
983119983139983156983151983138983141983154 2001 983122983151983149983141 F983151983151983140 983137983150983140 A983143983154983145983139983157983148983156983157983154983137983148 983119983154983143983137983150983145983162983137983156983145983151983150 983151983142 983156983144983141 983125983150983145983156983141983140 N9831379831569831459831519831509831552004
9251052123 9789251052129
19 L983286983142 M H983268983148983155983151983157983150983145983158983141983154983155983145983156983141983156983141983156 N983157983156983154983145983156983145983151983150 I983150983155983156983145983156983157983156983145983151983150983141983150 983142983286983154 983147983148983145983150983145983155983147 983151983139983144 983141983160983152983141983154983145983149983141983150983156983141983148983148 983149 L983145983150983147983286983152983145983150983143983155
983157 983120983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983152983137983156983156983141983154983150 983137983150983140 983137983139983156983145983158983145983156983161 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983137983150983140 983150983151983150983085
983152983154983141983143983150983137983150983156 983123983159983141983140983145983155983144 983159983151983149983141983150 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201165(12)12959830851301
20 I983150983155983156983145983156983157983156983141 983151983142 M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 N983157983156983154983145983156983145983151983150983137983148 983123 983127983141983145983143983144983156 G983137983145983150 983140983157983154983145983150983143 983120 I983150983155983156983145983156983157983156983141 983151983142
M983141983140983145983139983145983150983141 983123983157983138983139983151983149983149983145983156983156983141983141 983151983150 D983145983141983156983137983154983161 I N983157983156983154983145983141983150983156 983123983157983152983152983148983141983149983141983150983156983155 983140983157983154983145983150983143 983120 983118983157983156983154983145983156983145983151983150 983140983157983154983145983150983143
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 1948
ACCEPTED MANUSCRIPT
19
983152983154983141983143983150983137983150983139983161 983152983137983154983156 983113 983159983141983145983143983144983156 983143983137983145983150 983152983137983154983156 983113983113 983150983157983156983154983145983141983150983156 983155983157983152983152983148983141983149983141983150983156983155 983127983137983155983144983145983150983143983156983151983150 DC N983137983156983145983151983150983137983148
A983139983137983140983141983149983161 983120983154983141983155983155 1990
21 983123983152983151983150983143 C983129 D983141983142983145983150983145983150983143 983156983141983154983149 983152983154983141983143983150983137983150983139983161 983154983141983139983151983149983149983141983150983140983137983156983145983151983150983155 983142983154983151983149 983156983144983141 D983141983142983145983150983145983150983143 983124983141983154983149
983120983154983141983143983150983137983150983139983161 983127983151983154983147983143983154983151983157983152 983114983105983117983105 2013309(23)2445
22 N983137983156983145983151983150983155 983125 983123983156983137983156983145983155983156983145983139983137983148 A983150983150983141983160 983085 C983151983157983150983156983154983161 C983148983137983155983155 2013
23 L983151983142 M H983145983148983137983147983145983158983145983085C983148983137983154983147983141 L 983123983137983150983140983145983150 983123983123 983140983141 A983155983155983145983155 983123 983129983157 983127 983127983141983145983140983141983154983152983137983155983155 E D983145983141983156983137983154983161 983142983137983156 983145983150983156983137983147983141 983137983150983140983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983154983141983148983137983156983145983151983150 983156983151 983141983155983156983154983137983140983145983151983148 983137983150983140 983152983154983151983143983141983155983156983141983154983151983150983141 983152983148983137983155983149983137 983148983141983158983141983148983155 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983123983159983141983140983145983155983144 983159983151983149983141983150 983106983117983107 983127983151983149983141983150983155 983112983141983137983148983156983144 20099((L983151983142 M
983149983137983154983145983141983148983151983142983147983145983155983141 983123983137983150983140983145983150 983123983123 983155983158983141983150983155983137983150983140983145983150983147983145983155983141 983127983141983145983140983141983154983152983137983155983155 E
983141983148983145983155983137983138983141983156983141983159983141983145983140983141983154983152983137983155983155983158983137983145983150983145983151983147983145983155983141) D983141983152983137983154983156983149983141983150983156 983151983142 M983141983140983145983139983137983148 E983152983145983140983141983149983145983151983148983151983143983161 983137983150983140 B983145983151983155983156983137983156983145983155983156983145983139983155
K983137983154983151983148983145983150983155983147983137 I983150983155983156983145983156983157983156983141 983123E983085171 77 983123983156983151983139983147983144983151983148983149 983123983159983141983140983141983150)
24 983124983137983138983154983145983162983145 FM 983123983137983154983137983155983159983137983156983144983145 G M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141 983137983150983140 983149983137983156983141983154983150983137983148 983155983141983154983157983149 983149983145983139983154983151983150983157983156983154983145983141983150983156983155 983137983150983140
983156983144983141983145983154 983154983141983148983137983156983145983151983150 983156983151 983138983145983154983156983144 983159983141983145983143983144983156983085A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983107983151983148983148983137983138983151983154983137983156983145983158983141
983122983141983155983141983137983154983139983144 983151983150 983113983150983156983141983154983150983137983148 983117983141983140983145983139983145983150983141 983137983150983140 983120983157983138983148983145983139 983112983141983137983148983156983144 20113(8)617983085632
25 B983151983154983141983150983155983156983141983145983150 M 983113983150983156983154983151983140983157983139983156983145983151983150 983156983151 983149983141983156983137983085983137983150983137983148983161983155983145983155 C983144983145983139983144983141983155983156983141983154 983125K J983151983144983150 983127983145983148983141983161 amp 983123983151983150983155 2009
26 C983151983144983141983150 J 983123983156983137983156983145983155983156983145983139983137983148 983152983151983159983141983154 983137983150983137983148983161983155983145983155 983142983151983154 983156983144983141 983138983141983144983137983158983145983151983154983137983148 983155983139983145983141983150983139983141983155 H983145983148983148983155983140983137983148983141 NJ L E983154983148983138983137983157983149
A983155983155983151983139983145983137983156983141983155 198827 D983145983141983156983141983156983145983139983155 A983151N983137 E983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983149983137983150983157983137983148 983155983156983141983152983155 983145983150 983156983144983141 983137983139983137983140983141983149983161 983141983158983145983140983141983150983139983141 983137983150983137983148983161983155983145983155 983152983154983151983139983141983155983155
2012
28 983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 H983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 C983137983150983137983140983137 983137983154983141 983139983151983150983155983157983149983145983150983143
983149983151983154983141 983140983145983141983156983137983154983161 983152983154983151983156983141983145983150 983137983156 16983085 983137983150983140 36983085983159983141983141983147 983143983141983155983156983137983156983145983151983150 983156983144983137983150 983139983157983154983154983141983150983156983148983161 983154983141983139983151983149983149983141983150983140983141983140 983138983161 983156983144983141
D983145983141983156983137983154983161 983122983141983142983141983154983141983150983139983141 I983150983156983137983147983141983155 983152983154983145983149983137983154983145983148983161 983142983154983151983149 983140983137983145983154983161 983142983151983151983140 983155983151983157983154983139983141983155 983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144
2014((983123983156983141983152983144983141983150983155 983124983126 983127983151983151 H I983150983150983145983155 983123M E983148983137983150983143983151 983122 983154983141983148983137983150983143983151983139983142983154983145983157983138983139983139983137) C983144983145983148983140 983137983150983140 F983137983149983145983148983161
983122983141983155983141983137983154983139983144 I983150983155983156983145983156983157983156983141 BC C983144983145983148983140983154983141983150983155 H983151983155983152983145983156983137983148 983126983137983150983139983151983157983158983141983154 B983154983145983156983145983155983144 C983151983148983157983149983138983145983137 C983137983150983137983140983137)
29 983124983137983148983137983145 983122983137983140 N 983122983145983156983156983141983154983137983156983144 C 983123983145983141983143983149983157983150983140 983124 983141983156 983137983148 L983151983150983143983145983156983157983140983145983150983137983148 983137983150983137983148983161983155983145983155 983151983142 983139983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161 983145983150983156983137983147983141
983137983150983140 983149983137983139983154983151983150983157983156983154983145983141983150983156 983139983151983149983152983151983155983145983156983145983151983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 6 983159983141983141983147983155 983152983151983155983156983085983152983137983154983156983157983149 983105983154983139983144983145983158983141983155 983151983142
983111983161983150983141983139983151983148983151983143983161 983137983150983140 983119983138983155983156983141983156983154983145983139983155 2011283(2)185983085190
30 983120983145983145983154983137983145983150983141983150 983124 I983155983151983148983137983157983154983145 E L983137983143983155983156983154983286983149 H L983137983145983156983145983150983141983150 K I983149983152983137983139983156 983151983142 983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983150983157983156983154983145983141983150983156983145983150983156983137983147983141 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137 983152983154983151983155983152983141983139983156983145983158983141 983139983151983144983151983154983156 983155983156983157983140983161 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150
200696(6)10959830851104
31 D983141 983126983154983145983141983155983141 983123983122 D983141 H983141983150983137983157983159 983123 D983141 B983137983139983147983141983154 G D983144983151983150983156 M C983144983154983145983155983156983151983152983144983141 AB E983155983156983145983149983137983156983145983151983150 983151983142 D983145983141983156983137983154983161 F983137983156
I983150983156983137983147983141 983151983142 B983141983148983143983145983137983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983105983150983150983137983148983155 983151983142 983118983157983156983154983145983156983145983151983150 amp 983117983141983156983137983138983151983148983145983155983149 200145(6)
32 M983137983154983156983145983150983141983162 H A983148983148983141983150 LH L983157983150983143983137983144983151 M C983144983137983158983141983162 A 983120983141983148983156983151 GH M983137983156983141983154983150983137983148 983142983137983156983150983141983155983155 983145983150 M983141983160983145983139983137983150 983159983151983149983141983150
983152983154983141983140983145983139983156983155 983138983151983140983161 983139983151983149983152983151983155983145983156983145983151983150 983139983144983137983150983143983141983155 983145983150 983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983105983140983158983137983150983139983141983155 983145983150 983109983160983152983141983154983145983149983141983150983156983137983148
983117983141983140983145983139983145983150983141 amp 983106983145983151983148983151983143983161 199435299983085107
33 K983157983138983151983156983137 K I983156983151983144 H 983124983137983155983137983147983137 M 983141983156 983137983148 C983144983137983150983143983141983155 983151983142 983149983137983156983141983154983150983137983148 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983138983151983140983161983159983141983145983143983144983156 983137983150983140 983142983141983156983137983148
983143983154983151983159983156983144 983156983144983154983151983157983143983144983151983157983156 983152983154983141983143983150983137983150983139983161 983145983150 983152983154983141983143983150983137983150983156 J983137983152983137983150983141983155983141 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 amp
983111983161983150983137983141983139983151983148983151983143983161 983122983141983155983141983137983154983139983144 201339(9)13839830851390
34 C983137983154983138983151983150983141 983120 983123983151983138983154983141983158983145983141983148983137 M J983145983149983141983150983141983162 D M983137983154983156983145983150983141983162 C D983141 A983143983157983141983154983151 983122G 983120983151983139983151983158983145 M M983137983156983141983154983150983137983148983148983141983157983147983151983139983161983156983141 983149983141983156983137983138983151983148983145983155983149 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983152983157983141983154983152983141983154983145983157983149 983137983150983140 983145983156983155 983154983141983148983137983156983145983151983150 983156983151 983142983141983156983137983148 983143983154983151983159983156983144
983105983139983156983137 983119983138983155983156983141983156983154983145983139983145983137 983141983156 983111983161983150983141983139983151983148983151983143983145983139983137 983123983139983137983150983140983145983150983137983158983145983139983137 199271(4)266983085272
35 G983151983151983140983137983154983162983145 K983144983151983145983143983137983150983145 M 983120983137983147983150983137983144983137983140 983130 M983137983154983140983137983150983145983137983150 F 983124983144983141 983154983141983148983137983156983145983151983150983155983144983145983152 983138983141983156983159983141983141983150 983150983157983156983154983145983141983150983156983155 983145983150983156983137983147983141
983137983150983140 983152983154983141983141983139983148983137983149983152983155983145983137 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983114983151983157983154983150983137983148 983151983142 983122983141983155983141983137983154983139983144 983145983150 983117983141983140983145983139983137983148 983123983139983145983141983150983139983141983155
201217(983123983125983120983120L2)983123210983085983123217
36 983120983145983141983154983155 L983123 D983145983143983143983137983158983145 983123N 983124983144983137983150983143983137983149 983123 983126983137983150 983122983137983137983145983146 JMA 983123983144983141983156983156983161 983120983123 H983137983157983156983158983137983155983156 JGAJ C983144983137983150983143983141983155 983145983150 983141983150983141983154983143983161
983141983160983152983141983150983140983145983156983157983154983141 983137983150983156983144983154983151983152983151983149983141983156983154983161 983137983150983140 983141983150983141983154983143983161 983145983150983156983137983147983141 983140983157983154983145983150983143 983156983144983141 983139983151983157983154983155983141 983151983142 983152983154983141983143983150983137983150983139983161 983137983150983140
983148983137983139983156983137983156983145983151983150 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 I983150983140983145983137983150 983159983151983149983141983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199561(3)501983085513
37 A983148983138983141983154983156983145983085F983145983140983137983150983162983137 A D983145983141983156 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983156983151983156983137983148 983137983150983156983145983151983160983145983140983137983150983156 983139983137983152983137983139983145983156983161 983145983150 983149983137983156983141983154983150983137983148 983137983150983140
983157983149983138983145983148983145983139983137983148 983139983151983154983140 983138983148983151983151983140 983114983151983157983154983150983137983148 983151983142 983117983137983156983141983154983150983137983148983085983110983141983156983137983148 983137983150983140 983118983141983151983150983137983156983137983148 983117983141983140983145983139983145983150983141 200212(1)5998308563
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2048
ACCEPTED MANUSCRIPT
20
38 C983151983150983159983137983161 983122 983122983141983140983140983161 983123 D983137983158983145983141983155 J D983145983141983156983137983154983161 983154983141983155983156983154983137983145983150983156 983137983150983140 983159983141983145983143983144983156 983143983137983145983150 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199953(11)849983085853
39 F983157983150983143 EB 983122983145983156983139983144983145983141 LD 983127983151983151983140983144983151983157983155983141 L983122 983122983151983141983144983148 983122 K983145983150983143 JC 983130983145983150983139 983137983138983155983151983154983152983156983145983151983150 983145983150 983159983151983149983141983150 983140983157983154983145983150983143
983152983154983141983143983150983137983150983139983161 983137983150983140 983148983137983139983156983137983156983145983151983150 983137 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983124983144983141 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150
199766(1)80
40 H983154983151983150983141983147 M D983151983157983138983147983151983158983137 983120 H983154983150983139983145983137983154983145983147983151983158983137 D 983130983137983140983137983147 983130 D983145983141983156983137983154983161 983145983150983156983137983147983141 983151983142 983141983150983141983154983143983161 983137983150983140 983150983157983156983154983145983141983150983156983155 983145983150983154983141983148983137983156983145983151983150 983156983151 983154983141983155983156983145983150983143 983141983150983141983154983143983161 983141983160983152983141983150983140983145983156983157983154983141 983137983150983140 983137983150983156983144983154983151983152983151983149983141983156983154983145983139 983152983137983154983137983149983141983156983141983154983155 983151983142 C983162983141983139983144 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 201352(1)117983085125
41 J983137983150983155983155983151983150 N N983145983148983155983142983141983148983156 A G983141983148983148983141983154983155983156983141983140983156 M 983141983156 983137983148 M983137983156983141983154983150983137983148 983144983151983154983149983151983150983141983155 983148983145983150983147983145983150983143 983149983137983156983141983154983150983137983148 983138983151983140983161 983149983137983155983155
983145983150983140983141983160 983137983150983140 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983156983151 983138983145983154983156983144 983159983141983145983143983144983156 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200887(6)17439830851749
42 K983151983152983152983085H983151983151983148983145983144983137983150 LE 983158983137983150 L983151983137983150 MD 983127983151983150983143 983127983127 K983145983150983143 JC L983151983150983143983145983156983157983140983145983150983137983148 983137983155983155983141983155983155983149983141983150983156 983151983142 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983159983141983148983148983085983150983151983157983154983145983155983144983141983140 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150983139983148983157983140983145983150983143 983139983151983149983149983141983150983156983137983154983161 983138983161 983120983145983156983147983145983150 983122M
983131983139983151983154983154983141983139983156983141983140983133 983131983152983157983138983148983145983155983144983141983140 983141983154983154983137983156983157983149 983137983152983152983141983137983154983155 983145983150 AM J CLIN N983125983124983122 2000 J983137983150 71(1) 157983133 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 199969(4)697
43 G983157983141983148983145983150983139983147983160 I D983141983158983148983145983141983143983141983154 983122 M983157983148983148983145983141 983120 983126983137983150983155983137983150983156 G E983142983142983141983139983156 983151983142 983148983145983142983141983155983156983161983148983141 983145983150983156983141983154983158983141983150983156983145983151983150 983151983150 983140983145983141983156983137983154983161
983144983137983138983145983156983155 983152983144983161983155983145983139983137983148 983137983139983156983145983158983145983156983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156 983159983151983149983141983150 A983154983137983150983140983151983149983145983162983141983140 983139983151983150983156983154983151983148983148983141983140 983156983154983145983137983148 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150 201091(2)373983085380
44 K983151983154983152983145983085H983161983286983158983268983148983156983145 E 983123983139983144983159983137983138 983125 L983137983137983147983155983151983150983141983150 DE L983145983150983146983137983149983137 H H983141983145983150983151983150983141983150 983123 N983145983155983147983137983150983141983150 L E983142983142983141983139983156 983151983142
983145983150983156983141983150983155983145983158983141 983139983151983157983150983155983141983148983148983145983150983143 983151983150 983156983144983141 983153983157983137983148983145983156983161 983151983142 983140983145983141983156983137983154983161 983142983137983156983155 983145983150 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983137983156 983144983145983143983144 983154983145983155983147 983151983142
983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142 983118983157983156983154983145983156983145983151983150 2012108(5)910983085917
45 M983151983155983141983155 983122G C983137983155983141983161 983123A 983121983157983145983150983150 EG 983141983156 983137983148 983120983154983141983143983150983137983150983139983161 983137983150983140 G983148983161983139983141983149983145983139 I983150983140983141983160 983119983157983156983139983151983149983141983155 983155983156983157983140983161 E983142983142983141983139983156983155
983151983142 983148983151983159 983143983148983161983139983141983149983145983139 983145983150983140983141983160 983139983151983149983152983137983154983141983140 983159983145983156983144 983139983151983150983158983141983150983156983145983151983150983137983148 983140983145983141983156983137983154983161 983137983140983158983145983139983141 983151983150 983155983141983148983141983139983156983141983140 983152983154983141983143983150983137983150983139983161
983151983157983156983139983151983149983141983155 983105983149983141983154983145983139983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 2014(3)517983085523
983144983156983156983152983151983150983148983145983150983141983148983145983138983154983137983154983161983159983145983148983141983161983139983151983149983151983139983151983139983144983154983137983150983141983139983148983139983141983150983156983154983137983148983137983154983156983145983139983148983141983155961CN98308500981961983142983154983137983149983141983144983156983149983148
46 983127983151983148983142983142 983123 L983141983143983137983154983156983144 J 983126983137983150983143983155983143983137983137983154983140 K 983124983151983157983138983154983151 983123 A983155983156983154983157983152 A A 983154983137983150983140983151983149983145983162983141983140 983156983154983145983137983148 983151983142 983156983144983141 983141983142983142983141983139983156983155 983151983142
983140983145983141983156983137983154983161 983139983151983157983150983155983141983148983145983150983143 983151983150 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983137983150983140 983143983148983157983139983151983155983141 983149983141983156983137983138983151983148983145983155983149 983145983150 983151983138983141983155983141 983152983154983141983143983150983137983150983156
983159983151983149983141983150 983113983150983156983141983154983150983137983156983145983151983150983137983148 983114983151983157983154983150983137983148 983151983142 983119983138983141983155983145983156983161 200832(3)49598308550147 983127983145983150983147983158983145983155983156 A 983120983141983154983155983155983151983150 983126 H983137983154983156983145983150983145 983124N983123 983125983150983140983141983154983154983141983152983151983154983156983145983150983143 983151983142 983141983150983141983154983143983161 983145983150983156983137983147983141 983145983155 983148983141983155983155 983139983151983149983149983151983150 983137983149983151983150983143
983152983154983141983143983150983137983150983156 983159983151983149983141983150 983145983150 I983150983140983151983150983141983155983145983137 983120983157983138983148983145983139 983112983141983137983148983156983144 983118983157983156983154983145983156983145983151983150 20025(4)523983085529
48 983140983151983155 983123983137983150983156983151983155 983121 983123983145983139983144983145983141983154983145 983122 M983137983154983139983144983145983151983150983145 DML 983126983141983154983148983161 J983157983150983145983151983154 E B983154983137983162983145983148983145983137983150 983152983154983141983143983150983137983150983156 983137983150983140 983148983137983139983156983137983156983145983150983143
983159983151983149983141983150 983140983151 983150983151983156 983139983144983137983150983143983141 983156983144983141983145983154 983142983151983151983140 983145983150983156983137983147983141 983156983151 983149983141983141983156 983150983157983156983154983145983156983145983151983150983137983148 983143983151983137983148983155 983106983117983107 983152983154983141983143983150983137983150983139983161 983137983150983140
983139983144983145983148983140983138983145983154983156983144 201414(1)186
49 A983138983141983161983155983141983147983141983154983137 M983126 M983151983154983154983145983155 JA D983137983158983145983155 GK 983119983123983157983148983148983145983158983137983150 AJ A983148983156983141983154983137983156983145983151983150983155 983145983150 983141983150983141983154983143983161 983144983151983149983141983151983155983156983137983155983145983155 983156983151
983142983137983158983151983157983154 983137983140983145983152983151983155983141 983156983145983155983155983157983141 983143983137983145983150 A 983148983151983150983143983145983156983157983140983145983150983137983148 983155983156983157983140983161 983145983150 983144983141983137983148983156983144983161 983152983154983141983143983150983137983150983156 983159983151983149983141983150 983105983157983155983156983154983137983148983145983137983150 983137983150983140
983118983141983159 983130983141983137983148983137983150983140 983114983151983157983154983150983137983148 983151983142 983119983138983155983156983141983156983154983145983139983155 983137983150983140 983111983161983150983137983141983139983151983148983151983143983161 2015
50 983120983154983141983150983156983145983139983141 AM 983120983151983152983152983145983156983156 983123D G983151983148983140983138983141983154983143 G983122 983120983154983141983150983156983145983139983141 A A983140983137983152983156983145983158983141 983155983156983154983137983156983141983143983145983141983155 983154983141983143983157983148983137983156983145983150983143 983141983150983141983154983143983161
983138983137983148983137983150983139983141 983145983150 983144983157983149983137983150 983152983154983141983143983150983137983150983139983161 983112983157983149983137983150 983154983141983152983154983151983140983157983139983156983145983151983150 983157983152983140983137983156983141 19951(2)149983085161
51 M983139G983151983159983137983150 CA M983139A983157983148983145983142983142983141 FM M983137983156983141983154983150983137983148 983150983157983156983154983145983141983150983156 983145983150983156983137983147983141983155 983137983150983140 983148983141983158983141983148983155 983151983142 983141983150983141983154983143983161 983157983150983140983141983154983154983141983152983151983154983156983145983150983143983140983157983154983145983150983143 983141983137983154983148983161 983152983154983141983143983150983137983150983139983161 983109983157983154983151983152983141983137983150 983146983151983157983154983150983137983148 983151983142 983139983148983145983150983145983139983137983148 983150983157983156983154983145983156983145983151983150 201266(8)906983085913
52 E983154983147983147983151983148983137 M K983137983154983152983152983145983150983141983150 M J983137983158983137983150983137983145983150983141983150 J 983122983268983155983268983150983141983150 L K983150983145983152 M 983126983145983154983156983137983150983141983150 983123M 983126983137983148983145983140983145983156983161 983137983150983140
983154983141983152983154983151983140983157983139983145983138983145983148983145983156983161 983151983142 983137 983142983151983151983140 983142983154983141983153983157983141983150983139983161 983153983157983141983155983156983145983151983150983150983137983145983154983141 983142983151983154 983152983154983141983143983150983137983150983156 F983145983150983150983145983155983144 983159983151983149983141983150 983105983149983141983154983145983139983137983150
983114983151983157983154983150983137983148 983151983142 983109983152983145983140983141983149983145983151983148983151983143983161 2001154(5)466983085476
53 M983137983139983140983145983137983154983149983145983140 J B983148983157983150983140983141983148983148 J A983155983155983141983155983155983145983150983143 983140983145983141983156983137983154983161 983145983150983156983137983147983141 983127983144983151 983159983144983137983156 983137983150983140 983159983144983161 983151983142 983157983150983140983141983154983085983154983141983152983151983154983156983145983150983143
983118983157983156983154983145983156983145983151983150 983122983141983155983141983137983154983139983144 983122983141983158983145983141983159983155 199811(2)231983085253
54 983120983151983157983140983141983158983145983143983150983141 M983123 983119983139983151983150983150983151983154 983120J A 983122983141983158983145983141983159 983151983142 983120983144983161983155983145983139983137983148 A983139983156983145983158983145983156983161 983120983137983156983156983141983154983150983155 983145983150 983120983154983141983143983150983137983150983156 983127983151983149983141983150 983137983150983140
983124983144983141983145983154 983122983141983148983137983156983145983151983150983155983144983145983152 983156983151 983120983155983161983139983144983151983148983151983143983145983139983137983148 H983141983137983148983156983144 983126983151983148 36 C983144983137983149 A983140983145983155 I983150983156983141983154983150983137983156983145983151983150983137983148 20061998308519
55 D983157983142983151983157983154 DL 983122983141983145983150983137 JC 983123983152983157983154983154 GB E983150983141983154983143983161 983145983150983156983137983147983141 983137983150983140 983141983160983152983141983150983140983145983156983157983154983141 983151983142 983142983154983141983141983085983148983145983158983145983150983143 983148983137983139983156983137983156983145983150983143
C983151983148983151983149983138983145983137983150 983159983151983149983141983150 983145983150 983137983150 983157983154983138983137983150 983155983141983156983156983145983150983143 983109983157983154983151983152983141983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
200256(3)205983085213
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2148
ACCEPTED MANUSCRIPT
21
56 L983137983145983150 K983129 C983137983156983137983148983137983150983151 983120M M983141983156983137983138983151983148983145983139 C983144983137983150983143983141983155 983145983150 983120983154983141983143983150983137983150983139983161 983107983148983145983150983145983139983137983148 983151983138983155983156983141983156983154983145983139983155 983137983150983140 983143983161983150983141983139983151983148983151983143983161
200750(4)938983085948
57 983123983156983141983145983150 983124983120 983123983139983144983151983148983148 983124983119 983123983139983144983148983157983156983141983154 MD 983123983139983144983154983151983141983140983141983154 CM 983120983148983137983155983149983137 983148983141983152983156983145983150 983145983150983142983148983157983141983150983139983141983155 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156
983143983137983145983150 983137983150983140 983152983151983155983156983152983137983154983156983157983149 983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 983105983149983141983154983145983139983137983150 983114983151983157983154983150983137983148 983151983142 983107983148983145983150983145983139983137983148 983118983157983156983154983145983156983145983151983150
199868(6)12369830851240
58 K983150983157983140983155983141983150 983126K H983141983145983156983149983137983150983150 BL H983137983148983148983140983151983154983155983155983151983150 983124I 983123983151983154983141983150983155983141983150 983124IA 983119983148983155983141983150 983123F M983137983156983141983154983150983137983148 983140983145983141983156983137983154983161983143983148983161983139983137983141983149983145983139 983148983151983137983140 983140983157983154983145983150983143 983152983154983141983143983150983137983150983139983161 983137983150983140 983143983141983155983156983137983156983145983151983150983137983148 983159983141983145983143983144983156 983143983137983145983150 983138983145983154983156983144 983159983141983145983143983144983156 983137983150983140 983152983151983155983156983152983137983154983156983157983149
983159983141983145983143983144983156 983154983141983156983141983150983156983145983151983150 A 983155983156983157983140983161 983159983145983156983144983145983150 983156983144983141 D983137983150983145983155983144 N983137983156983145983151983150983137983148 B983145983154983156983144 C983151983144983151983154983156 983106983154983145983156983145983155983144 983114983151983157983154983150983137983148 983151983142
983118983157983156983154983145983156983145983151983150 2013109(8)14719830851478
59 983130983144983137983150983143 C L983145983157 983123 983123983151983148983151983149983151983150 CG H983157 FB D983145983141983156983137983154983161 983142983145983138983141983154 983145983150983156983137983147983141 983140983145983141983156983137983154983161 983143983148983161983139983141983149983145983139 983148983151983137983140 983137983150983140 983156983144983141 983154983145983155983147
983142983151983154 983143983141983155983156983137983156983145983151983150983137983148 983140983145983137983138983141983156983141983155 983149983141983148983148983145983156983157983155 983108983145983137983138983141983156983141983155 983107983137983154983141 200629(10)22239830852230
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2248
ACCEPTED MANUSCRIPT
22
Table 1 Assessing the risk of bias in individual studies using the Quality Criteria Checklist
obtained from the American Dietetic Association Evidence Analysis Manual
W a s t h e r e s e a r c h q u e s t i o n c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o
u t c o m e s c l e a r l y d e f i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s t a k e n i n t o
c o n s i d e
r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Alberti-
Fidanza et
al37
radic (-) (-) radic (x) radic radic radic radic radic Neutral
Carbone
et al34
radic radic radic radic (-) (-) radic (-) (-) radic Neutral
Conway
et al38
radic radic radic radic (-) (-) radic radic radic (-) Neutral
De
Vriese31 radic radic radic (-) (x) (-) radic radic radic radic Neutral
Fung et
al39
radic radic radic radic (-) radic radic radic radic radic Positive
Goodarzi
Khoigani
et al35
radic radic radic (-) (-) (-) radic (-) radic radic Neutral
Guelinckx
et al43
radic radic radic radic (-) (-) radic radic radic radic Neutral
Hronek et
al40
radic radic (-) (x) (x) (-) radic radic radic radic Neutral
Jansson etal41
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kopp
Hoolihan
et al42
radic (-) radic radic (x) (-) radic radic (-) radic Neutral
Korpi
Hyovalti
et al44
radic radic radic radic (x) (-) radic radic radic radic Neutral
Kubota et
al33
radic radic radic (x) (-) (-) (-) (-) radic radic Neutral
Lof et
al
23
radic (-) radic radic (x) (-) radic (-) radic radic Neutral
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2348
ACCEPTED MANUSCRIPT
23
W a s t h e r e s e a r c h q u e s t i o n
c l e a r l y s t a t e d
W a s t h e s e l e c t i o n o f s t u d y
s u b j e c t s f r e e
f r o m b i a s
W e r e s t u d y g r o u p s c o m p a r a b l e
W a s m e t h o d o f h a n d l i n g w
i t h d r a w a l s
d e s c r i b e d
W a s b l i n d i n g u s e d t o p r e v e n t
i n t r o d u c t i o n o f b i a s
W e r e i n t e r v e n t i o n p r o c e d u
r e a n d
c o m p a r i s o n ( s ) d e s c r i b e d i n
d e t a i l W h e r e
i n t e r v e n i n g f a c t o r s d e s c r i b e d
W e r e o u t c o m e s c l e a r l y d e f
i n e d a n d t h e
m e a s u r e m e n t s v a l i d a n d r e
l i a b l e
W a s t h e s t a t i s t i c a l a n a l y s i s
a p p r o p r i a t e
f o r t h e s t u d y d e s i g n a n d t y p e o f o u t c o m e
i n d i c a t o r s
A r e c o n c l u s i o n s s u p p o r t e d
b y r e s u l t s
w i t h b i a s e s a n d l i m i t a t i o n s
t a k e n i n t o
c o n s i d e r a t i o n
I s b i a s d u e t o s t u d y rsquo s f u n d i n g o r
s p o n s o r s h i p u n l i k e l y
O v e r a l l Q u a l i t y R a t i n g
Martinez
et al32
radic (-) (x) (-) (x) (-) (-) (x) (-) radic Neutral
Moses et
al45
radic radic (-) radic (x) (-) radic radic radic radic Neutral
Piers et
al36
radic (-) radic (-) (x) (-) radic radic (-) radic Neutral
Tabrizi et
al24
radic radic radic (-) (x) (-) (-) (-) radic radic Neutral
Wolff et
al46
radic radic radic radic radic radic radic radic radic radic Positive
Key radic = yes (x) = no (-) = unclear
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2448
ACCEPTED MANUSCRIPT
Table 2 Study characteristics values are reported as mean plusmn standard deviation
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Alberti-Fidanza
et al37
2002
To examine
longitudinally the total
antioxidant capacity
(ToAC) of women
from early pregnancy
to delivery and of their
newborns and relate
the results to the
dietary intake of the
same women during
pregnancy
Italy developed
n = 12
BMI 226 (55)
kgm2
Age 311 (42)
years
Parity 18 (09)
nil smokers
Collected by
qualified and
experienced
dietitians
using the diet
history
method during
the 1st 2
nd and
3rd
trimesters
Not stated It is import
monitor To
during the e
period of pr
and we sug
intakes of f
vegetables
necessary
antioxidant
and pro-vit
supplementregarding th
antioxidant
mothers an
newborns
particularly
preterm m
valuable in
for increasi
chance that
pregnancie
successfull
and achievephysiologic
deliveries
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Carbone et al34
1992
Present patterns of
leukocyte energymetabolism during
normal pregnancy and
puerperium and its
possible relationship to
fetal growth and
maternal nutrient
intake
Spain
developed
n = 33
BMI 227 (22)
kgm2
Age 28 (36)
years
Parity of 1 n =
18 234 n = 15
3-day weight
food recordincluding 1
holiday
completed at
11 19 and 35
weeks
gestation
Gestational age less
than 12 weeks normalmenstrual cycles
before conception no
personal or family
history of metabolic
vascular andor genetic
disorders no apparent
disease present at the
time of visit and
pregnancy
classification as low
risk
There was
correlation proteinDN
and head
circumferen
weeks of ge
Findings m
a relationsh
between the
metabolism
maternal le
and fetal
developme
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Conway et al38
1999
To explore the
relationship betweendietary restraint and
appropriateness of
weight gain during
pregnancy using AIM
criteria and to assess
dietary intake during
pregnancy in relation
to dietary restraint
England
developedRestrainedn = 32
BMI 22 (24)
kgm2
Age 312 (46)
years
Parity of 1 n =
28 2 n = 4
Unrestrainedn = 30
BMI 207 (196)
kgm2
Age 306 (36)
years
Parity of 1 n =
26 2 n = 4
7-day weighed
food record at12 and 30
weeks
gestation
Caucasian women
expecting their first orsecond singleton baby
over 18yrs of age and
free from any medical
condition which might
affect nutrition or fetal
outcomes
Providing p
women witguidance ab
appropriate
gains may b
beneficial
cessation o
during preg
associated w
weight gain
be prudent
accompany
advice abou
smoking dupregnancy
advice abou
and weight
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2748
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
De Vriese et
al
31
2001
To determine the
relative validity andusefulness of a Dutch
food frequency
questionnaire (FFQ)
adapted to the Belgian
diet by comparing
dietary fat intake data
collected by this FFQ
with the 7d food
record in pregnant
Belgian women during
the 1st and 3
rd
trimesters
Belgium
developed
n = 26
BMI 22 (176-
293) kgm2
Age 30 (25-37)
years
All pregnant
women were
nulliparous
7-day
estimated foodrecord (EFR)
during the 1st
(median 15
weeks) and 3rd
(median 35
weeks)
trimesters A
FFQ
containing 180
of the most
common fat-
containingfoods was
conducted at
the same
timepoints
Data recorded
was based on
the EFR
First pregnancy
diastolic bloodpressure below 90mm
Hg not diabetic no
proteinuria and not
suffering from renal or
cardiovascular disease
The FFQ in
conjunctionindividual f
compositio
of Belgian
adequate m
reasonably
subjects acc
their dietary
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2848
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Fung et al39
1997
To determine whether
fractional absorptionof a stable isotope of
zinc from a
standardized meal is
altered in well-
nourished women
followed from before
conception through
lactation and
determine whether the
change in fractional
zinc absorption (ZFA)
is related to indicatorsof maternal zinc status
USA developed
n = 13
BMI 223 (29)
kgm2
Age 30 (29)
years
Parity of 1 n =
10 2 n = 3
3-day weighed
food recordnon-
consecutive
days two
weekdays and
one weekend
at 8-10 weeks
24-26 weeks
and 34-36
weeks
gestation
Aged 22-40yrs body
mass index of 19-26kgm2 non-smoking
non-diabetic non-
vegetarian no drug and
alcohol use and no
previous obstetric or
gynecological
complications
Well-nouri
women meadditional n
zinc during
pregnancy
increasing
and by a 30
increase in
absorption
not signific
increase in
zinc was du
to an increa
intake of daFZA increa
early in the
period pres
an adaptatio
lactation pr
These data
that mechan
regulating z
homeostasi
between pr
and lactatio
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 2948
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Hronek et al40
2013
To evaluate the dietary
intake of energy andnutrients (DIEN) of
Czech pregnant
women and compare it
with recommended
daily allowances
(RDA)
Czechoslovakia
developed
Participants
were randomly
recruited from
both rural and
city regions
n = 152
BMI 211 (36)
kgm2
Age 289 (36)
years
7-day food
record onconsecutive
days using
scales and
household
measures at 0-
20 weeks 21-
29 weeks 30-
36 weeks and
37-39 weeks
gestation
Nonusers of chronic
medication non-smokers and non-
abusers of alcohol or
drugs and had parity
le2 Subjects were
euthyroid
normoglyceamic and
not anemic
Lower intak
energy andsome nutrie
relative to t
correspond
during preg
Evaluated D
correspond
body size v
Modificatio
intake or al
supplement
recommend
folic acid ivitamin D
iodine and
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3048
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Jansson et al41
2008
To identify hormonal
factors that canexplain the link
between early
pregnancy BMI
maternal dietary
intake and birth
weight
Sweden
developing
n = 49
BMI 255 (69)
kgm2
Age 30 (45)
years
Diet history
coveringdietary intake
over a 24hr
period
collected by a
registered
dietitian at 8-
12 weeks and
32-35 weeks
gestation
Inclusion criteria
Scandinavian heritagehealthy and ge20 years
old
Exclusion criteria
smoking
vegetarianism assisted
reproduction
concurrent disease
such as eating disorder
or diabetes
development of
pregnancy
complications such asgestational diabetes
preeclampsia or
intrauterine growth
restriction
High first t
maternal seresistin and
trimester IG
were correl
increased b
weight We
that low ser
concentrati
IGFBP-1 re
link betwee
BMI and in
fetal growth
increasingbioavailabi
IGF-1 regu
placental nu
transport
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3148
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Khoigani et
al
35
2012
To assess the
association betweenpreeclampsia risk and
the intake of 40 macro
and micro nutrients
during the first second
and third trimesters
based on demographic
and reproductive
characteristics and
physical activity of
pregnant women
Iran developing
n = 620 (t1 n =
584 t2 n = 510)
BMI 235 (39)
kgm2
Age 256 (44)
years
Parity 158
(076)
48-hour
dietary recallcompleted at
11-15 weeks
26 weeks and
34-37 weeks
gestation
Interviewers
were trained
Pregnant women who
did not have conditionssuch as factors causing
preeclampsia preterm
delivery low birth
weight and factors
which may affect
pregnancy outcomes
such as smoking drug
addiction digestive
and metabolic disease
hemoglobinopathies
eating disorders
allergies mentaldiseases and
malignancy
Mean value
saturated fafirst trimest
subjects wh
experienced
preeclamps
pregnancy
than in othe
women Int
manganese
C vitamin
and carboh
during the t
trimester wsignificantl
among preg
women wh
developed
preeclamps
significant
association
other micro
macro nutri
preeclamps
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3248
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kopp-Hoolihan
et al
42
1999
To assess how well-
nourished womenmeet the energy
demands of pregnancy
and to identify factors
that predict an
individualrsquos metabolic
response
USA developed
n = 10
BMI 231 (21)
kgm2
Age 291 (5)
years
3 day weighed
food recordcompleted
before
pregnancy and
at 8-10 24-26
34-36 weeks
gestation and
4-6 weeks
post- partum
Healthy non-smoking
women
Well-nouri
women useways to me
energy dem
pregnancy
reduction in
induced
thermogene
increased e
intake dep
less fat mas
predicted
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3348
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Kubota et al33
2013
To investigate the
associations amongchanges in dietary
intake maternal
bodyweight and fetal
growth during
pregnancy
Japan
developedUnderweightn = 32
BMI 175 (01)
kgm2
Age 297 (52)
years
Normaln = 94
BMI 21 (18)
kgm2
Age 308 (51)
yearsOverweightn = 9
Age 286 (36)
years
BMI 334 (65)
kgm2
Digital images
taken beforeand after
meals on 3
consecutive
days at 14-16
25-27 and 32-
34 weeks
gestation a
dietitian
reviewed
photos and
recorded
intakevalidation of
method not
reported
Singleton pregnant
Japanese women wereincluded those which
had suffered from
obstetrical
complications such as
premature delivery
gestational diabetes
and pre-eclampsia or
did not submit digital
images were excluded
Dietary inta
similar thropregnancy
not correlat
fetal growth
Japanese na
recommend
advising ex
intake
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3448
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Lof et al23
2009
Investigate whether
intakes of total dietaryfat types of fat and
weight gain are
associated with
estradiol and
progesterone levels in
plasma during
pregnancy
Sweden
developed
n = 226
BMI 229 (3)
kgm2
Age 32 (4) years
3 day weight
food record onconsecutive
days including
one weekend
at 12 25 and
33 weeks
gestation
Calculations
conducted by
a nutritionist
Women with multi-
fetal pregnanciesmissing data at
baseline questionnaire
or for measurements of
either body weight or
dietary intake were
excluded
No associat
between geweight gain
dietary fat i
(total or sub
and plasma
levels Prog
levels corre
weight gain
pregnancy
Martinez et
al32
1994
To determine how
gestational weight gain
varies according toBMI in a developing
nation Mexico
Mexico
developing
n = 36
BMI 235 (26)
kgm2
Age 31 (54)
years
Diet history
collected by
trainedinterviewers
twice per
month and
reported as
mean first and
third trimester
values
Women with an 18
month old or schooler
7-8 years in the SolisValley who became
pregnant at the time of
initial recruitment
provided that they were
no more than 5 months
pregnant
In this sam
women the
relationshipBMI at con
weight gain
pregnancy
was similar
women in U
States Low
maternal B
predicted sm
birth weigh
through at l
months of l
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3548
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Piers et al36
1995
To determine changes
in maternal energymetabolism during
pregnancy and
lactation by comparing
a group of well-
nourished pregnant
and lactating Indian
women at 12 24 and
34 wk gestation and at
12 and 24 wk
postpartum with a
non-pregnant non-
lactating controlgroup
India
developing
n = 18
BMI 217 (24)
kgm2
Age 296 (52)
years
5 day
estimated foodrecord using
household
measures of
known volume
at 12 24 and
34 weeks
gestation and
12 and 24
weeks post-
partum
participants
were trained touse the
measure by a
dietitian who
also checked
all records
Pregnant subjects of
good health were non-smokers had no
appetite affected by
morning sickness
before the initial
metabolic
measurement at 12
weeks gestation
BMR is sig
higher duripregnancy
with non-pr
non-lactatin
and remain
even when
differences
weight are
for Well-n
Indian wom
weight and
similar to th
well-nourisWestern wo
Birth weigh
infants born
to be lower
cost of preg
estimated to
MJ close t
MJ estimat
FAOIWHO
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3648
ACCEPTED MANUSCRIPT
Observational studies
Source Aim Study
population
Dietary
assessment
method
Inclusion exclusion
criteria
Concl
Tabrizi et al24
2011
To assess the
relationship betweenenergy protein and
mineral intake of
pregnant women and
birth weight of their
neonates
Iran developing
n = 450
BMI 239 (38)
kgm2
Age 261 (58)
years
24 hour Recall
collected atthe end of the
1st 2
nd and 3
rd
trimesters
Qualification
training of
interviewer
not reported
Women of 16 to 40
years whocontinuously visited
health care centers
during the three
trimesters in Khoy city
Maternal en
protein caland zinc int
with higher
serum calci
and zinc in
birth weigh
neonates
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3748
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Guelinckx
et al
43
2010
Study which
degree ofintervention can
improve dietary
habits according to
the National Diet
Recommendations
increase physical
activity level in
obese pregnant
women and
control gestational
weight gain
Belgium
developedrandomly
assigned using
block
randomization
Control(routine)
n =43
BMI 335 (39)
kgm2
Age 294 (44)
yrs
Parity of 1 n = 17Passive (nutrition
and PA
brochure)
n = 37
BMI 334 (31)
kgm2
Age 287 (4) yrs
Parity of 1 n = 15
Active (brochure
+ group dietary
counselling)
n = 42BMI 341 (45)
kgm2
Age 28 (36) yrs
Parity of 1 n = 20
7-day food
recordsincluding both
weighed and
household
measures
during each
trimester of
pregnancy
Records were
checked by a
nutritionist
White women attending
the prenatal clinicbefore 15wks gestation
Exclusion criteria pre-
existing diabetes or
developing gestational
diabetes multiple
pregnancy premature
labor (lt37 wks
gestation) primary
needs for nutritional
advice in case of
metabolic disorder
kidney problems Crohndisease allergic
conditions and
inadequate knowledge
of the Dutch language
because this language
was used for both the
brochure and group
discussions
A lifestyle interv
based on a brochalone or group se
combined with
individual advice
improve dietary h
throughout pregn
in obese women
in the absence of
medical or obstet
complications
maintaining or
increasing PA du
pregnancy is diffTo obtain a signi
decrease in GWG
individually desig
caloric intake res
based on energy
expenditure data
be included
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3848
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Korpi-
Hyovalti etal44
2012
To evaluate the
effect of intensivedietary therapy on
quality of diet
weight gain and
birth weight in
women at high risk
of gestational
diabetes mellitus
Finland
developedrandomized into
group 1 or 2
using computed
randomization
Close follow up(general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Lifestyle
intervention (individualized
nutrition advice)
n = 27
BMI 273 (6)
kgm2
4 day weighed
food record onconsecutive
days including
one weekend
completed at
8-12 26-28
and 36-40
weeks
gestation
Records
checked by a
nutritionist
A three-factor
eating
questionnaire
was also used
at the 1st and
3rd
trimester
Women with one or
more risk factors forgestational diabetes
venous plasma glucose
concentration after 12h
overnight fasting was
48-55 mmoll and the
2h oral glucose
tolerance test plasma
glucose lt78 mmoll
were recruited
Women diagnosed with
GDM at 8-12 wks
gestation wereexcluded
There were no cl
differences in satfat and fiber intak
however
polyunsaturated f
increase in the lif
intervention grou
Intensive weight
education led to a
somewhat lower
gain during pregn
and higher birth w
of the infants in
lifestyle intervenbut no difference
macrosomia whe
compared to the c
follow up group
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 3948
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Moses et al45
2014
To determine
whether offeringlow glycemic
index (LGI) dietary
advice at
the first antenatal
visit would result
in a lower fetal
birth weight
birth percentile
and ponderal index
(PI) than providing
healthy eating
(HE) advice
Australia
developedrandomly
assigned using
computer-
generated
random numbers
1 or 2
Healthy Eating
(counselled to
follow a healthy
diet based on the
AGHE4
) n = 280
BMI 247 (5)
kgm2
Age 299 (5) yrs
Low Glycemic
Index
(individualized
nutrition advice
on a LGI diet)
n = 296
BMI 243 (52)
kgm2 Age 299 (52)
yrs
3 day
estimated foodrecord using
household
measures at 16
and 36 weeks
gestation
records
reviewed by a
dietitian
Enrolment at lt 20 wk
of gestation with asingleton pregnancy at
least 18 years old
ability to read and
understand English
language and ability to
comply with visit
schedules Subjects
excluded if they had
diabetes or previous
gestational diabetes
special dietary needs
the presence of medicalconditions that could
compromise their
metabolic status or the
use of medications that
were likely to influence
body weight
A low intensity d
intervention withcompared with H
in pregnancy did
result in significa
differences in bir
weight fetal perc
of PI
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4048
ACCEPTED MANUSCRIPT
Randomized controlled trials
Source Aim Study
population and
intervention
Dietary
assessment
method
Inclusion exclusion
criteria
Conclusion
Wolff et
al
46
2008
To determine
whether a 10 hourdietary
consultations
restricts weight
gain in obese
women and
whether this
restriction impacts
on pregnancy-
induced changes in
glucose
metabolism
Denmark
developedRandomized into
group 1 or 2
using computed
randomization
Control (general
information on
diet and PA)
n = 27
BMI 255 (34)
kgm2
Age 30 (5) yearsIntervention (10
x 1 hour
consultations)
n = 27
BMI 273 (6)
kgm2
Age 28 (4) years
7 day weighed
food record atinclusion (15
plusmn 3 wks) 27
and 36 weeks
gestation
Pregnant obese women
(BMI gt30) in their earlypregnancy were
recruited Exclusion
criteria included
smoking lt18 year old
or gt45 year old
multiple pregnancy or
medical conditions
which impact fetal
growth
Restriction of
gestational weighin obese women
achievable and re
the deterioration
glucose metaboli
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4148
ACCEPTED MANUSCRIPT
41
983120983137983143983141 983092983089 983151983142 983092983090
FIGURE LEGENDS
Figure 1 The screening and selection process
Figure 2 Meta-analysis of the standardized mean difference in energy intake between early
and late pregnancy Overall effect shows a small increase in energy intake which is not
significant Data are expressed as standardized mean difference using r = 074 from
Spearmanrsquos correlation coefficient with random effects Study names with an additional
numerical value represent a different population group within the study eg control and
intervention groups in a randomized controlled trial
Figure 3 Meta-analysis of the standardized mean difference in gestational weight gain
throughout pregnancy Overall effect shows a significant increase in maternal weight Data
are expressed as standardized mean difference using r = 085 from Spearmanrsquos correlation
coefficient with random effects Study names with an additional numerical value represent a
different population group within the study for example control and intervention groups in a
randomized controlled trial
Figure 4 A Exploring a correlation between mean difference in energy intake between early
and late pregnancy and gestational weight gain There is no significant correlation between
mean energy increase and mean gestational weight gain at a 1 significance level (r = 0321
P = 0110) B Scatterplot of gestational weight gain (GWG) compared to mean body mass
index (BMI) for each study population Shaded areas represent the Institute of Medicine
guidelines for gestational weight gain (GWG) for each BMI category underweight (BMI lt
185 kgm2 GWG 125 to18 kg) normal (BMI 185 to 249 kgm
2 GWG 115 to 155 kg)
overweight (BMI 250 to 299 kgm2 GWG 65 to 115 kg) and obese (BMI ge 30 kgm
2
GWG 50 to 90 kg)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4248
ACCEPTED MANUSCRIPT
42
983120983137983143983141 983092983090 983151983142 983092983090
Figure 5 Assessing the risk of publication bias using standard error by standard difference in
means from 14 observational studies and 4 randomized controlled trials The solid angled
lines indicate a triangular region where 95 of studies are expected to lie in the absence of
both biases and heterogeneity and solid vertical line represents no intervention effect Begg
and Mazumdarrsquos rank correlation was 0163 (two-tailed p-value = 0252) and Eggerrsquos
regression intercept was 0528 (two-tailed p-value=0826)
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4348
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4448
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4548
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4648
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4748
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT
8172019 Je Beile 2015
httpslidepdfcomreaderfullje-beile-2015 4848
ACCEPTED MANUSCRIPT