Age of pregnancy

Multiples congenital birth defects

Total

OR

CI_95%

Chi square

P-value

Yes N (%)

No

N (%)

≤36

1 (2.8)

35 (97.2)

36

0.1

[1.01 - 0.73]

7.3

0.007

37+

8 (25)

24 (75.5)

32

1