Table 6.

Multivariate logistic regression for predictors of postoperative vomiting on POD 2 in all patients

Variable	RR (95% CI)	P value
Gender	8.930 (0.957–83.347)	0.055
High-risk individuals of PONV	170.609 (5.773–5042.077)	0.003
Preoperative mouth-rinsing	0.007 (0.000–0.331)	0.012
Duration of surgery > 315 min	22.611 (1.307–391.205)	0.032
Use of colloid	44.161 (2.754–708.126)	0.007
PONV prophylaxis	0.012 (0.000–0.479)	0.019

Abbreviations: POD: Postoperative day