Maternal folic acid supplementation and dietary folate intake and congenital heart defects

Baohong Mao, Jie Qiu, Nan Zhao, Yawen Shao, Wei Dai, Xiaochun He, Hongmei Cui, Xiaojuan Lin, Ling Lv, Zhongfeng Tang, Sijuan Xu, Huang Huang, Min Zhou, Xiaoying Xu, Weitao Qiu, Qing Liu and Yawei Zhang

PLOS ONE, 2017, vol. 12, issue 11, 1-14

Abstract: Background: It has been reported that folic acid supplementation before and/or during pregnancy could reduce the risk of congenital heart defects (CHDs). However, the results from limited epidemiologic studies have been inconclusive. We investigated the associations between maternal folic acid supplementation, dietary folate intake, and the risk of CHDs. Methods: A birth cohort study was conducted in 2010–2012 at the Gansu Provincial Maternity & Child Care Hospital in Lanzhou, China. After exclusion of stillbirths and multiple births, a total of 94 births were identified with congenital heart defects, and 9,993 births without any birth defects. Unconditional logistic regression was used to estimate the associations. Results: Compared to non-users, folic acid supplement users before pregnancy had a reduced risk of overall CHDs (OR: 0.42, 95% CI: 0.21–0.86, Ptrend = 0.025) after adjusted for potential confounders. A protective effect was observed for certain subtypes of CHDs (OR: 0.37, 95% CI: 0.16–0.85 for malformation of great arteries; 0.26, 0.10–0.68 for malformation of cardiac septa; 0.34, 0.13–0.93 for Atrial septal defect). A similar protective effect was also seen for multiple CHDs (OR: 0.49, 95% CI: 0.26–0.93, Ptrend = 0.004). Compared with the middle quartiles of dietary folate intake, lower dietary folate intake (

Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0187996

DOI: 10.1371/journal.pone.0187996

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