Time

Group A (bupivacaine)

N = 50

Group B (Pethidine)

N = 50

P value

4 h

53.3%

33.3%

0.0446*

NS

8 h

46.7%

33.3%

0.173

NS

12 h

66.7%

60%

0.489

NS

24 h

23.3%

6.7%

0.0207*

NS