Table 1. Comparison of demography, duration of surgery, intra-operative fentanyl used, first morphine dose with 24 hours morphine consumption, and PONV score in both groups.

ASA: American Society of Anesthesiologists physical status, PONV: postoperative nausea and vomiting, NS: not significant, S: significant

Variable	Group A (n= 30)	Group B (n=30)	P-value
Age	50.26+10.39	53.23+8.36	0.114 (NS)
Weight (kg)	61.73+11.84	63.3+13.21	0.315 (NS)
ASA (I/II/III)	3/25/2	6/24/0	0.22(NS)
Gender (M/F)	17/13	18/12	0.793 (NS)
First morphine dose (min)	240 (105–500)	90 (57–225)	0.034 (S)
PONV score	13 (43.33%)	19 (63.33%)	0.12 (NS)
48 hours morphine consumption (mg)	7.4+4.57	11.86+5.58	0.002 (S)