Table 1. Patient Characteristics and Duration of Operation ^a,b.

	Group B (Bupivacaine) (n = 20)	Group M (Meperidine) (n = 20)	Group BM (Bupivacaine + Meperidine) (n = 20)	P Value
Age, y	25.1 ± 4.3	29.4 ± 5.3	31.6 ± 8	0.12
Gender; male	13 (65)	14 (70)	15 (75)	0.788
Weight, kg	67 ± 8.6	73.5 ± 8	71 ± 5.7	0.33
Duration of operation, min	115 ± 39	118 ± 40	114 ± 33	0.998

^aData are given as mean ± SEM or number of patient for gender (%).

^bThere were no significant differences.