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European Journal of Nutrition

, Volume 57, Issue 1, pp 167–177 | Cite as

Effects of low-glycemic-index diets in pregnancy on maternal and newborn outcomes in pregnant women: a meta-analysis of randomized controlled trials

  • Ru Zhang
  • Shufen Han
  • Guo-Chong Chen
  • Zeng-Ning Li
  • Irma Silva-Zolezzi
  • Gerard Vinyes Parés
  • Yi WangEmail author
  • Li-Qiang QinEmail author
Original Contribution

Abstract

Purpose

Maternal diet with a high glycemic index (GI) is associated with fetal overgrowth and higher infant body adiposity. Effects of low-GI diet on maternal and newborn outcomes have been assessed in both healthy pregnancy and gestational diabetes mellitus, but the results remain inconclusive. This meta-analysis aimed to examine the effects of low-GI diets on maternal and newborn outcomes.

Methods

PubMed, Clinical Trials, and Cochrane Library databases were searched for relevant randomized trials up to January 2016. Random- or fixed-effects models were used to calculate combined treatment effects.

Results

A total of 11 trials involving 1985 women were eligible for analysis. This meta-analysis assessed 7 maternal and 11 newborn outcomes. Of these, gestational weight gain (GWG), fasting blood glucose (FBG), newborn birth weight, ponderal index (PI), proportion of macrosomia, and large for gestational age (LGA) were investigated in more than 8 trials. Compared with control diets, low-GI diets significantly reduced FBG (weight mean differences (WMD) = −0.18 mmol/L, 95 % CI: −0.33, −0.02), 2-h postprandial glucose level (WMD = −0.33 mmol/L, 95 % CI: −0.54, −0.12), and the proportion of LGA (RR = 0.52, 95 % CI: 0.31, 0.89). A lower GWG (WMD = −0.69 kg, 95 % CI: −1.74, 0.36) and birth weight (WMD = −0.10 kg, 95 % CI: −0.23, 0.03) were also observed without significant differences. Heterogeneity was observed in the GWG, FBG, and birth weight analyses. Low-GI diets did not affect other maternal and newborn outcomes. In subgroup and sensitivity analyses, the intervention effects of low GI on GWG and FBG varied.

Conclusions

Low-GI diets may have beneficial effects on maternal outcomes for those at risk of developing high glucose levels, without causing adverse effects on newborn outcomes. However, results should be interpreted with caution because of the evidence of heterogeneity and limited number of studies.

Keywords

Low glycemic index Pregnancy outcomes Randomized controlled trials Meta-analysis 

Notes

Compliance with ethical standards

Conflict of interest

Irma Silva-Zolezzi is employee of Nestlé Research Center, Lausanne. Gerard Vinyes Parés and Yi Wang are employees of Nestlé Research Center Beijing. The authors state that there is no conflict of interest.

Supplementary material

394_2016_1306_MOESM1_ESM.doc (64 kb)
Supplementary material 1 (DOC 64 kb)
394_2016_1306_MOESM2_ESM.doc (46 kb)
Supplementary material 2 (DOC 46 kb)
394_2016_1306_MOESM3_ESM.doc (69 kb)
Supplementary material 3 (DOC 69 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Ru Zhang
    • 1
  • Shufen Han
    • 1
  • Guo-Chong Chen
    • 1
  • Zeng-Ning Li
    • 2
  • Irma Silva-Zolezzi
    • 3
  • Gerard Vinyes Parés
    • 4
  • Yi Wang
    • 4
    Email author
  • Li-Qiang Qin
    • 1
    Email author
  1. 1.Department of Nutrition and Food Hygiene, School of Public HealthSoochow UniversitySuzhouChina
  2. 2.Department of NutritionFirst Hospital of Hebei Medical UniversityShijiazhuangChina
  3. 3.Nutrition and Health ResearchNestlé Research CenterLausanneSwitzerland
  4. 4.Nestlé Research CenterBeijingChina

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