Table 2.

The frequencies and percentages of nausea and vomiting, as well as visual analog scale (VAS) for nausea and pain at recovery, and 4 , 8 ,12 and 24 hours after caesarean section in groups (n = 32 each) receiving fentanyl (groups F), remifentanyl (group F) and fentanyl plus morphine (group C)

Time		Group F	Group R	Group C	P value
At recovery	Nausea (n, %)	6 (18.8% )	10 (31.3%)	11 (34.4%)	0.16
	Vomiting (n, %)	1 (3.1%)	2 (6.3%)	1 (3.1%)	0.38
	VAS (for nausea)	1.07±0.5	1.5±0.8	2.2±1.2	0.265
	VAS (for pain)	7.62±2.6	8.59±2.3	7.06±3.08	0.078
4 h after surgery	Nausea (n, %)	2 (6.3%)	1 (3.1%)	1 (3.1%)	0.38
	Vomiting (n, %)	0	0	0
	VAS(for nausea)	0.88±0.02	0.53±0.01	0.35±0.01	0.832
	VAS(for pain)	6.71±2	7.15±2.2	6.15±2.4	0.206
8 h after surgery	Nausea (n, %)	0	0	2(6.3%)	0.06
	Vomiting (n, %)	0	0	0
	VAS(for nausea)	0	0	0.49	0.132
	VAS(for pain)	5.78±2.21	5.43±2.28	5.68±2.44	0.828
12 h after surgery	Nausea (n, %)	0	0	1 (3.1%)	0.18
	Vomiting (n, %)	0	0	0
	VAS (for nausea)	0	0	0.17	0.372
	VAS (for pain)	4.53±2.39	4.5±2.52	4.12±2.04	0.741
24 h after surgery	Nausea (n, %)	0	0	1 (3.1%)	0.18
	Vomiting (n, %)	0	0	0
	VAS (for nausea)	0	0	0.17	0.382
	VAS (for pain)	2.87±1.64	2.75±1.66	2.56±1.84	0.766
Meperidine used (mg)		101.2±2 9.5*	138.1±43.7	121.8±35.9*	0.001

VAS: visual analogue scale. *denotes significant difference from remifentanil-treated group