Table 3.

Multiple logistic regression analysis of overall postoperative vomiting

Binary Outcome of 24-h Postoperative Vomiting	β (Standard error)	P-value	Odds ratio (=eβ) [95% CI]
Neostigmine dose (per mg)	0.277 (0.175)	0.110	1.32 [0.94-1.86]
Anticholinergic		0.030	1.00
Glycopyrrolate	-0.729 (0.507)	0.150	0.48 [0.18-1.30]
Atropine	-1.140 (0.464)	0.010	0.32 [0.13-0.79]
Study-(Hovorka 1997 (22) as reference)		-	1.00
Study-Janhunen 1972 (28)	1.657(0.339)	0.000	5.24 [2.70-10.19]
Study-King 1988 (24)	-0.207 (0.427)	0.630	0.81 [0.35-1.88]
Study-Boeke 1994 (20)	-0.136 (0.330)	0.680	0.87 [0.46-1.67]
Study-Watcha 1995(27)	0.132 (0.383)	0.730	1.14 [0.54-2.42]
Study-Nelskyla 1998 (11)	-0.968 (0.321)	0.003	0.38 [0.20-0.71]
Study-Joshi 1999 (23)	-0.945 (0.308)	0.002	0.39 [0.21-0.71]
Study-Lovstad 2001 (25)	-2.094 (0.448)	0.000	0.12 [0.05-0.30]
Study-Chhibber 1999 (12).	1.042 (0.486)	0.030	2.84 [1.09-7.35]
Constant	-0.478 (0.199)	0.020	0.62