TABLE 4.

Univariable and multivariate logistic regression analysis of the factors associated with postoperative delirium.

Variables	Univariable			Multivariable
	Unadjusted OR	95%CI	P-value	Adjusted OR	95%CI	P-value
Age	1.155	1.012, 1.317	0.032	1.200	1.030, 1.398	0.019
ASA physical status III	2.071	0.460, 9.319	0.343
Preoperative baseline MMSE scores	0.820	0.540, 1.245	0.351
Duration of surgery	1.010	1.002, 1.018	0.019	1.010	1.001, 1.019	0.036
Duration of anesthesia	1.006	0.999, 1.014	0.107
EBL	1.000	0.995, 1.005	0.953
Mechanical bowel preparation	4.454	1.308, 15.169	0.017	4.792	1.274, 18.028	0.020

MMSE, Mini-Mental State Examination; EBL, estimated blood loss; OR, odds ratio.