Table 3.

Comparison of time for awakening and time to discharge duration the PACU among the three groups

	Group Alf2 (n = 42)	Group Alf4 (n = 42)	Group Sal (n = 42)
Time for awakening (mins)	10.98 ± 3.43*	15.44 ± 3.40*	10.07 ± 4.07*
Time to discharge (mins)	31.19 ± 4.64†	35.16 ± 3.97†	30.53 ± 2.82†

Alf2 0.2 μg/kg/min alfentanil, Alf4 0.4 μg/kg/min alfentanil, PACU post-anesthesia care unit, Sal saline

^*The time for awakening of Groups Alf2 and S was comparable and significantly shorter than that of Group Alf4 (P < 0.01)

^†There were no significant differences between Groups Alf2 and Sal, the time to discharge of Group Alf4 was significantly longer than that of Groups Alf2 and Sal (P < 0.01)