4.4 Article

The association of dietary glycaemic index and glycaemic load with gestational weight gain and newborn birth weight

Journal

BRITISH JOURNAL OF NUTRITION
Volume 123, Issue 7, Pages 818-825

Publisher

CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0007114519003362

Keywords

Glycaemic index; Glycaemic load; Pregnancy; Pregnant women; Pregnancy outcomes

Funding

  1. Sao Paulo Research Foundation [FAPESP 2011/18579-0]

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Diet during pregnancy is related to several maternal and infant health outcomes; however, the relationship between maternal dietary glycaemic index (GI) and glycaemic load (GL) and gestational weight gain (GWG) or newborn birth weight is controversial. The purpose of the present study was to investigate the relationship between maternal dietary GI and GL and GWG and birth weight. A cohort of adult pregnant women with usual obstetric risk was followed in Botucatu, SP, Brazil. Two 24-h dietary recalls were collected in each gestational trimester (<14, 24-27, 31-34 weeks), one in person and the other by telephone. GI and GL were determined using the software Nutrition Data System for Research. GWG was obtained from medical records and evaluated as the weekly GWG between the second and third gestational trimesters. Newborn birth weight z-score in relation to gestational age was evaluated according to Intergrowth-21st Project recommendations. A multiple linear regression model, adjusted for potential confounders, showed a one-point increase in the GI resulted in a mean decrease of 12 center dot 9 (95 % CI -21 center dot 48, -4 center dot 24) g in weekly GWG; GL was not associated with this outcome. The birth weight z-score was not associated with GI (P = 0 center dot 763) or GL (P = 0 center dot 317). In conclusion, in a cohort of pregnant women considered at usual risk for obstetric complications, maternal dietary GI was negatively associated with weekly GWG in the second and third gestational trimesters. No association was observed between GL and GWG, and neither GI nor GL was associated with birth weight z-score.

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