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Maternal and pediatric nutrition

Maternal B-vitamin intake and B-vitamin supplementation during pregnancy in relation to neonatal congenital heart defects: a case-control study with propensity score matching

Abstract

Background/Objectives

The effect of dietary folate intake or folic acid (FA) supplementation during pregnancy on neonatal congenital heart defects (CHDs) remains inconclusive. There are limited data about non-folate-B-vitamin intake and the risk of CHDs. Furthermore, few studies have investigated dietary B-vitamin intake and B-vitamin supplement use simultaneously in relation to the risk of CHDs. This study aimed to explore the associations between maternal folate, vitamin B6, and vitamin B12 intake (dietary intake, total intake from diet and supplements); B-vitamin supplement use during pregnancy; and the risk of CHDs using the propensity score matching (PSM) method.

Methods

We conducted a case-control study and included 760 cases and 1600 controls in Shaanxi Province, China. Diet, supplement use and other information were collected through a questionnaire interview. By using the 1:2 ratio PSM method, 396 cases were matched with 792 controls. Conditional logistic regression was used to investigate the associations between maternal B-vitamin intake and supplement use during pregnancy and CHDs.

Results

Higher maternal dietary and total intake of folate and vitamin B12 were associated with reduced risk of CHDs, and the tests for linear trend were significant. Compared with non-users, maternal FA + VB6 + VB12 containing supplement use during pregnancy (OR 0.61, 95%CI 0.40–0.94), FA supplement use during pregnancy (OR 0.70, 95%CI 0.50–0.98) and in the first trimester (OR 0.62, 95%CI 0.46–0.85) were associated with a lower risk of CHDs.

Conclusions

The findings of this study suggest that a higher intake of folate and vitamin B12 during pregnancy reduces the risk of CHDs.

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Fig. 1: Flow chart of participants with inclusion and exclusion criteria.

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Acknowledgements

We are grateful to all researchers and all participants in the 2014–2017 survey for their contribution to data collection.

Funding

This research was funded by the National Natural Science Foundation of China (81230016, 81202218, the Shaanxi Health and Family Planning Commission (Sxwsjswzfcght2016-013), and the National Key Research and Development Program of China (2017YF0907200, 2017YF0907201).

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Authors

Contributions

RZ, LG, SD, and HY conceived and designed the study; RZ, LG, DZ, and PQ collected and cleared the data; RZ, LG and DZ analyzed and interpreted the data; RZ wrote the paper; LG, DZ, PQ, SD, and HY drafted and revised the manuscript. All authors read and approved the final version of the manuscript.

Corresponding authors

Correspondence to Shaonong Dang or Hong Yan.

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Conflict of interest

The authors declare that they have no conflict of interest.

Ethics approval

All subjects gave their written informed consent for inclusion before they participated in the study. The study was in accordance with the Helsinki Declaration, and the protocol was approved by the Ethics Committee of Xi’an Jiaotong University Health Science Center (Approval NO. 20120008).

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Zhang, R., Guo, L., Zhao, D. et al. Maternal B-vitamin intake and B-vitamin supplementation during pregnancy in relation to neonatal congenital heart defects: a case-control study with propensity score matching. Eur J Clin Nutr 75, 782–791 (2021). https://doi.org/10.1038/s41430-020-00804-2

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