Variable

Sildenafil plus low-dose aspirin (n = 200)

Low-dose aspirin only (n = 200)

P-value*

N

%

N

%

Parity

P0

29

14.5%

39

19.5%

0.297

P1

49

24.5%

49

24.5%

P2

59

29.5%

54

27.0%

P3

35

17.5%

33

16.5%

P4

26

13.0%

22

11.0%

P5

2

1.0%

3

1.5%

Previous miscarriages

Nil

76

38.0%

64

32.0%

0.082

1 Miscarriage

98

49.0%

98

49.0%

2 Miscarriages

26

13.0%

38

19.0%