Parity

Number of deaths

Percentage

Controls reference population

Percentage

p-value

0

12

9.1

0.0

0.0

0.0004

1

48

36.4

108

40.9

2

22

16.7

65

24.6

3

15

11.4

39

14.7

4

12

9.1

30

11.4

≥5

17

12.8

22

8.3

Unknown

6

4.5

0

0.0

Total

132

100

264

100