Table 5.

Predictors of postoperative complications

Predictor	Unadjusted analysis		Adjusted analysis
	Odds ratio (95% CI)	p value	Odds ratio (95% CI)	p value
Charlson Comorbidity Index score	1.51 (1.23–1.88)	< 0.001	1.47 (1.19–1.85)	< 0.001
Severity of cholecystitis	1.32 (0.57–2.92)	0.51	0.98 (0.36–2.49)	0.96
Compliance with guidelines for antibiotic use (reference: noncompliance)	1.57 (0.59–3.90)	0.34	1.80 (0.61–4.98)	0.27
Time to operation, h	1.01 (1.00–1.02)	0.13	1.00 (0.99–1.02)	0.62
Operative approach*	14.78 (3.35–103.03)	0.001	13.45 (2.16–125.49)	0.010
Duration of operation, min*	1.01 (1.00–1.02)	0.14	1.00 (0.99–1.01)	0.76

C statistic for the logistic regression analysis: 0.757. CI = confidence interval.

^*Collinear.