Skip to main content

Table 2 Prevalence of NTDs by sex and folic acid supplementation in northern China, 1993–1995 (per 1000 births)

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

 

Male

Female

Total

Male

Female

Total

Male

Female

Total

Male

Female

Total

Male

Female

Total

Yes*

18,201

1.2

1.2

1.2

0.1

0.2

0.2

1.1

0.9

1.0

0.2

0.1

0.2

1.4

1.3

1.3

No

12,664

3.8

8.7

6.1

1.7

5.0

3.2

2.1

3.7

2.8

0.5

0.2

0.3

4.2

8.8

6.4

Total

30,801

2.2

4.2

3.2

0.7

2.2

1.4

1.5

2.0

1.8

0.3

0.1

0.2

2.5

4.4

3.4

  1. NTD neural tube defect
  2. *Compared to group without folic acid supplementation, P < 0.001