Effects of dietary interventions on pregnancy outcomes: a systematic review and meta‐analysis

Gresham, Ellie; Bisquera, Alessandra; Byles, Julie; Hure, Alexis

doi:10.1111/mcn.12142

Cited by 57 publications

(66 citation statements)

References 95 publications

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“…Study findings summarized in systematic reviews and meta-analyses are diverse but suggest a beneficial effect (9,10,13,30). Additional research is needed because of the differences in interventions examined (e.g., diet quality, energy restriction, provision of fortified food products, dietary counseling) as well as the heterogeneous study populations and GDM diagnostic criteria.…”

Section: Discussionmentioning

confidence: 99%

“…Intervention studies were not included because results from these studies have been systematically reviewed (9,10,13).…”

Section: Study Selectionmentioning

confidence: 99%

“…Systematic reviews and metaanalyses of intervention studies examining dietary factors during pregnancy have shown mixed findings. A lower risk of GDM was found for dietary interventions, including a balanced diet (9), but not for fortified food products or dietary counseling (10). Findings may be mixed because the meta-analyses combined heterogeneous studies examining various types of interventions using different approaches to maintain compliance, different diagnostic criteria for GDM, and diverse populations in terms of ethnicity and BMI.…”

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confidence: 99%

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The Role of Energy, Nutrients, Foods, and Dietary Patterns in the Development of Gestational Diabetes Mellitus: A Systematic Review of Observational Studies

et al. 2015

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OBJECTIVEDiet may influence the risk of gestational diabetes mellitus (GDM), but inconsistent findings have been reported. The purpose of this study was to synthesize evidence from observational studies on the associations between dietary factors and GDM. RESEARCH DESIGN AND METHODSMedline and Embase were searched for articles published until January 2015. We included observational studies of reproductive-aged women that reported on associations of maternal dietary intake before or during pregnancy, including energy, nutrients, foods, and dietary patterns, with GDM. All relevant results were extracted from each article. The number of comparable studies that adjusted for confounders was insufficient to perform a meta-analysis. RESULTSThe systematic review included 34 articles comprising 21 individual studies (10 prospective cohort, 6 cross-sectional, and 5 case-control). A limited number of prospective cohort studies adjusting for confounders indicated associations with a higher risk of GDM for replacing 1-5% of energy from carbohydrates with fat and for high consumption of cholesterol ( ‡300 mg/day), heme iron ( ‡1.1 mg/day), red and processed meat (increment of 1 serving/day), and eggs ( ‡7 per week). A dietary pattern rich in fruit, vegetables, whole grains, and fish and low in red and processed meat, refined grains, and high-fat dairy was found to be beneficial. The current evidence is based on a limited number of studies that are heterogeneous in design, exposure, and outcome measures. CONCLUSIONSThe findings support current dietary guidelines to limit consumption of foods containing saturated fat and cholesterol, such as processed meat and eggs, as part of an overall balanced diet. Further large prospective studies are warranted.Gestational diabetes mellitus (GDM), defined as glucose intolerance with onset or first recognition during pregnancy (1), is a common pregnancy complication affecting ;7% of pregnancies (1,2). During the past 20 years, its prevalence has increased substantially across a range of multiethnic populations and is expected to continue

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Section: Discussionmentioning

confidence: 99%

“…Intervention studies were not included because results from these studies have been systematically reviewed (9,10,13).…”

Section: Study Selectionmentioning

confidence: 99%

mentioning

confidence: 99%

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The Role of Energy, Nutrients, Foods, and Dietary Patterns in the Development of Gestational Diabetes Mellitus: A Systematic Review of Observational Studies

et al. 2015

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“…Micronutrient deficiencies are associated with premature delivery (35)(36)(37)(38)(39)(40), and macronutrient interventions have shown to reduce the incidence of preterm birth (41). It is, therefore, plausible that the protective effect of CSB Plus on preterm birth was due to nutrient repletion.…”

Section: Discussionmentioning

confidence: 99%

Prenatal supplementation with Corn Soya Blend Plus reduces the risk of maternal anemia in late gestation and lowers the rate of preterm birth but does not significantly improve maternal weight gain and birth anthropometric measurements in rural Cambodian women: a randomized trial

Janmohamed

Karakochuk

Boungnasiri³

et al. 2016

The American Journal of Clinical Nutrition

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Background: Corn Soya Blend (CSB) Plus is a fortified dietary supplement used to help Cambodian women meet their nutritional requirements in pregnancy, although little is known about its ability to improve pregnancy outcomes. Objective: This study assessed the effect of prenatal CSB Plus supplementation on birth weight and secondary outcomes of low birth weight (,2500 g), small for gestational age, birth length and head circumference, preterm birth (,37 wk), maternal weight gain, and anemia at 24-28 wk, 30-32 wk, and 36-38 wk of gestation among rural Cambodian women. Design: A cluster-randomized trial was conducted in 75 villages in Kampong Chhnang Province, in which 547 women received CSB Plus (treatment) during the first trimester until delivery or continued their normal diet (control) based on their village residence. All women received routine daily iron folic acid tablets and were treated with additional iron folic acid if they were anemic (hemoglobin ,11 g/dL). Cluster-adjusted linear mixed-effect and logistic regression models were used to examine group differences. Results: There was no significant difference in birth weight between the CSB Plus and control group (46 g; 95% CI: 231, 123 g; P = 0.24). Significant reductions were observed in preterm birth (OR = 0.33; 95% CI: 0.12, 0.89) and anemia at 36-38 wk (OR = 0.51; 95% CI: 0.34, 0.77). There were no significant differences in low birth weight, small for gestational age, birth length, head circumference, or maternal weight gain. A higher rate of fetal loss was observed in the treatment group (10.2% compared with 3.7%; P , 0.01). Conclusions: In Cambodian women, CSB Plus consumed during pregnancy did not significantly increase maternal weight gain or improve birth size but did reduce maternal anemia in late gestation and preterm birth in comparison with women consuming a normal diet. The unexpectedly higher rate of fetal loss in the treatment group is concerning and warrants further investigation. This trial was registered at clinicaltrials.gov as NCT01413776.Am J Clin Nutr 2016;103:559-66.

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“…2014). Suboptimal nutritional status may make the growing fetus more vulnerable to harmful environmental exposures (e.g., tobacco, alcohol, toxic chemicals) intensifying their future health consequences (Carter et al., 2012; Nykjaer et al., 2014).…”

Section: Introductionmentioning

confidence: 99%

Relative validation of a short questionnaire to assess the dietary habits of pregnant American Indian women

Hartman

Elliott

Angal

et al. 2016

Food Science & Nutrition

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The objective of this study was to compare a short dietary screener developed to assess diet quality with interviewer‐administered telephone 24‐hour dietary recalls in a population of pregnant Northern Plains (NP) American Indian women. Participants were recruited from NP clinical sites of the Prenatal Alcohol and SIDS and Stillbirth (PASS) Network, as part of a large, prospective, multidisciplinary study. Prenatal PASS participants who enrolled prior to 24 weeks gestation were eligible to participate. Repeated 24‐hour dietary recalls were collected using the Nutrition Data System for Research (NDSR) software and a short dietary screener was administered intended to capture usual dietary intake during pregnancy. The available recalls were averaged across days for analysis. Items were grouped from the recalls to match the food group data estimates for the screener (e.g., total vegetables, total fruit, total dairy, total and whole grains). Deattenuated Pearson correlation coefficients were calculated between the two data sources after correcting for the within‐person variation in the 24‐hour recall data. A total of 164 eligible women completed the screener and at least two 24‐hour dietary recalls and were included in the analyses. Pearson deattenuated correlation coefficients between the diet screener and the dietary recalls for the majority of food groups were 0.40 or higher. This short diet screener to assess usual diet appears to be a valid instrument for use in evaluating diet quality among pregnant American Indian women.

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Effects of dietary interventions on pregnancy outcomes: a systematic review and meta‐analysis

Cited by 57 publications

References 95 publications

The Role of Energy, Nutrients, Foods, and Dietary Patterns in the Development of Gestational Diabetes Mellitus: A Systematic Review of Observational Studies

The Role of Energy, Nutrients, Foods, and Dietary Patterns in the Development of Gestational Diabetes Mellitus: A Systematic Review of Observational Studies

Prenatal supplementation with Corn Soya Blend Plus reduces the risk of maternal anemia in late gestation and lowers the rate of preterm birth but does not significantly improve maternal weight gain and birth anthropometric measurements in rural Cambodian women: a randomized trial

Relative validation of a short questionnaire to assess the dietary habits of pregnant American Indian women

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