Table 2.

Study parameters in the two groups

Observations	Group D (n=148) Mean±SD (95% CI)	Group I (n=150) Mean±SD (95% CI)	Group T (n=152) Mean±SD (95% CI)	P	Group D versus group I	Group D versus group T	Group I versus group T
Total duration of analgesia (h)	6.3±0.8 (4.7-7.9)	13.1±1.2 (10.7-15.4)	18.2±1.3 (15.5-20.6)	<0.001	<0.001	<0.001	<0.001
Rescue analgesic requirement (mg)	355.0±25.6 (304.8-405.1)	221.0±30.0 (162.2-279.8)	152.1±34.9 (83.7-220.5)	<0.001	<0.001	<0.001	<0.001
Patient satisfaction score	2.9±0.4 (2.1-3.6)	2.0±0.1 (1.8-2.2)	1.2±0.2 (0.8-1.6)	<0.001	<0.001	<0.001	<0.001
Dry mouth (n)	19	25	26	0.284
PONV (n)	1.4	2.1	1.4	0.565
Respiratory depression (n)	0	0	0	–

h-Hour, mg-Milligram, PONV-Postoperative nausea and vomiting, SD-Standard Deviation, CI - Confidence Interval, n-number