Yes

No

P

RR

CI 95%

N = 168

%

N = 77

%

Nulliparous

30

18

24

31

0.039*

1.55

0.79 - 3.03

Primiparous

66

39

16

21

0.020*

0.47

0.24 - 0.926

Multiparous

72

43

37

48

0.571