Table 2. Multivariate logistic regression analysis: Independent risk factors for postoperative ileus.

Variable	Odds ratio	95% CI	P value
Age-adjusted Charlson comorbidity index	1.310	1.150–1.492	<0.001
Duration of surgery (min)	1.004	1.001–1.008	0.015
Maximum pain NRS score during POD 3	1.174	1.044–1.319	0.007
Cumulative dose of rescue opioids used during POD 3 (morphine equivalents [mg])	1.027	1.014–1.040	<0.001

OR: odds ratio; CI: confidence interval; NRS: numerical rating scale; POD: postoperative days.