Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 507538
Title Quantifying the mediating effect of body mass index in the relationship between a Mediterranean diet and development of maternal pregnancy complications: Australian Longitudinal Study on Women’s Health
Author(s) Schoenaker, D.A.J.M.; Soedamah-Muthu, S.S.; Mishra, G.D.
Source American Journal of Clinical Nutrition 104 (2016)3. - ISSN 0002-9165 - p. 638 - 645.
Department(s) Chair Nutrition and Disease
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Mediterranean diet - body mass index - gestational diabetes - gestational hypertension - mediation
Abstract Background: The contribution of body mass index (BMI) to the observed associations between dietary patterns and risk of gestational diabetes mellitus (GDM) and hypertensive disorders of pregnancy (HDP) remains unclear. Objective: The objective of this study was to formally quantify the mediating effect of prepregnancy BMI in these associations. Design: Women (aged 25–30 y) participating in the Australian Longitudinal Study on Women’s Health were not pregnant at baseline in 2003 and reported ≥1 pregnancy up to 2012. GDM and HDP diagnoses were self-reported for each pregnancy and validated in a subset. A Mediterranean diet score was created by use of a baseline-validated food-frequency questionnaire and dichotomized to reflect low adherence (<25th percentile) and higher adherence (≥25th percentile). A causal inference framework for mediation analysis was used to estimate total, natural direct, and natural indirect effects of the prepregnancy Mediterranean diet on incident GDM and HDP and proportions mediated through prepregnancy BMI. Results: In 3378 women without a history of diabetes, 240 (7.1%) developed GDM. HDP was reported in 273 (8.6%) of 3167 women with no history of hypertension. Low adherence to the Mediterranean diet was associated with higher risk of GDM (OR: 1.35; 95% CI: 1.02, 1.60) and HDP (OR: 1.41; 95% CI: 1.18, 1.56), after adjustment for education, parity, polycystic ovary syndrome, energy intake, and physical activity. Proportions mediated through prepregnancy BMI (per 1-kg/m2 increase) were 32% and 22% for GDM and HDP, respectively. Conclusion: These findings suggest that prepregnancy BMI as a single mediator contributes substantially to the total effects of the prepregnancy Mediterranean diet on GDM and HDP risk.
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