Table 4.

Distribution of patients according to operative time

Operative time (min)	Group A		Group B
	No.	%	No.	%
31–60 min	6	24.0	13	52.0
61–90 min	8	32.0	12	48.0
61–90 min	11	44.0	0	0.0
Total	25	100.0	25	100.0