Table 3.

Univariable and multivariable analysis of factors associated with PONV.

	Univariable analysis		Multivariable analysis
	OR (95% CI)	P-value	OR (95% CI)	P-value
TIVA	0.53 (0.43–0.65)	<0.001	0.45 (0.35–0.60)	<0.001
Sex (F)	2.19 (1.78–2.69)	<0.001	1.85 (1.44–2.38)	<0.001
Age (years)	0.99 (0.98–1.00)	0.001	1.00 (0.9–1.01)	0.42
Hypertension	1.07 (0.82–1.39)	0.63	1.41 (0.98–2.03)	0.07
Previous MI	1.23 (0.69–2.18)	0.48	1.22 (0.61–2.42)	0.58
Diabetes mellitus	0.84 (0.69–1.02)	0.08	0.95 (0.73–1.25)	0.74
Previous CVA	1.17 (0.88–1.56)	0.27	1.04 (0.72–1.51)	0.82
Anesthetic duration (min)	1.01 (1.01–1.01)	<0.001	1.01 (1.00–1.01)	<0.001
Fentanyl dosage in PCA	1.00 (1.00–1.00)	<0.001	1.00 (1.00–1.00)	<0.001
Crystalloid	1.00 (1.00–1.00)	0.01	1.00 (1.00–1.00)	0.94

CI, confidence interval; CVA, cerebrovascular accident; MI, myocardial infarction; OR, odds ratio; PCA, patient-controlled analgesia; TIVA, total-intravenous anesthesia.

Wald confidence intervals were calculated.