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Table 4 Male:female rate ratio of NTDs by folic acid supplementation in northern China, 1993–1995

From: Periconceptional folic acid supplementation and sex difference in prevention of neural tube defects and their subtypes in China: results from a large prospective cohort study

Folic acid

N

Open NTDs

Anencephaly

Spina bifida

Encephalocele

Total NTDs

RR

95% CI

RR

95% CI

RR

95% CI

RR

95% CI

RR

95% CI

Yes

18,201

1.00

0.69–1.46

0.46

0.02–8.62

1.14

0.73–1.77

1.82

0.10–34.48

1.08

0.77–1.50

No

12,664

0.43

0.39–0.49

0.33

0.26–0.42

0.58

0.46–0.72

2.71

0.20–37.04

0.48

0.43–0.53

Total

30,801

0.53

0.48–0.57

0.34

0.27–0.43

0.73

0.63–0.84

2.27

0.58–8.59

0.58

0.54–0.63

  1. NTD neural tube defect, RR rate ratio, 95%CI, 95% confidence interval
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Nutrition Journal

ISSN: 1475-2891

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