Prenatal nutrition supplementation and growth biomarkers in preadolescent Bangladeshi children
A birth cohort study
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Little is known about the usefulness of biomarkers to study the influence of prenatal nutrition supplementation in improving child growth. Anthropometry is not always straightforward to understand how nutrition might impact growth, especially in settings with high rates of malnutrition and infections. We examined the effects of prenatal supplementation on growth and growth biomarkers and the relationship between anthropometric measures and growth biomarkers of children at 4.5 and 9 years of age. Children were enrolled from a longitudinal cohort, where mothers were randomized into daily supplementation with either early-food (≤9 gestation week [GW]) or usual-food (~20 GW) (608 kcal 6 days/week); they were further randomized to receive 30-mg or 60-mg iron with 400-μg folic acid, or multiple micronutrients (MM) in rural Bangladesh. Anthropometric data were collected from mothers at GW8 and children at 4.5 (n = 640) and 9 years (n = 536). Fasting blood was collected from children at each age. Early-food supplementation showed reduced stunting and underweight at 4.5 and 9 years age respectively compared to usual-food. Prenatal supplementations did not have any effect on growth biomarkers except for STAT5b expression which was lower in the early-food compared to the usual-food group (β = -0.21; 95 CI% = -0.36, -0.07). Plasma concentrations of 25-hydroxy vitamin D and calcium were both inversely associated with weight-for-age and body mass index-for-age Z-scores at 9 years, particularly in early-food and MM groups. Although there was minimal effect on child growth by prenatal supplementations, the associations of biomarkers with anthropometric indices were predominantly driven by timing of food or MM supplementations
Cohort · Cohort study · Environmental health · Fetal growth · Fetus · Obstetrics · Pregnancy · Birth, Development, and Health · Child Nutrition and Water Access · Infant Nutrition and Health · Medicine · Internal Medicine · Pediatrics
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