Association of preoperative depression and cognitive status with postoperative delirium in elderly patients with hip fracture

Table 4 Multivariable logistic regression analysis for independent predictors of postoperative delirium

Variable	Adjusted odds ratio	95%CI	P value
Preoperative depression (15-item Geriatric Depression Scale ≥ 5)	2.84	1.26-6.41	0.012
Preoperative cognitive impairment (Mini-Mental State Examination < 24)	3.92	1.71-8.98	0.001
Age ≥ 80 years	2.47	1.09-5.59	0.030
American Society of Anesthesiologists classification ≥ III	2.63	1.18-5.87	0.018
Albumin < 35 g/L	1.85	0.82-4.18	0.137
Surgical duration > 120 minutes	1.72	0.78-3.80	0.179

Model statistics: (1) Area under the curve = 0.78 (95%CI: 0.71-0.86); and (2) Hosmer-Lemeshow test P = 0.42.