. Author manuscript; available in PMC: 2014 May 21.

Published in final edited form as: Biol Res Nurs. 2012 Jun 20;15(4):382–389. doi: 10.1177/1099800412449181

Table 4.

Multivariate Binary Logistic Regression for Postoperative Nausea and Vomiting (PONV).

Variable	Odds ratio (OR)	95% Confidence intervals for OR		p value
Variable	Odds ratio (OR)	Lower	Upper	p value
History of PONV	5.379	1.574	18.387	.007
Gender	0.236	.084	.662	.006
Smoking status	1.359	.552	3.343	.505
Total opioids^a	0.073	.005	1.046	.054
CYP2D6 phenotype
EM (REF)	1.00
IM	0.492	.010	24.171	.721
PM	0.026	.002	.288	.003
Age	0.966	.931	1.003	.071
CYP2D6 phenotype by total opioids
EM	1.00			.036
IM	4.616	.026	822.837	.563
PM	207.726	3.525	12240.88	.010

Note. EM = extensive metabolizers; IM = intermediate metabolizers; PM = poor metabolizers.

Adjusted by weight.