Table 4.

Multivariate Models of Predisposing Factors for Incident Delirium after Hip Fracture Repair

Risk Factors	No Dementia Group (N = 284)		Probable Dementia Group (N = 141)		Total Sample ( N = 425)
	Adj. OR (95% CI)	p-value	Adj. OR (95%CI)	p-value	Adj. OR (95%CI)	p-value
age in years	1.07 (1.02, 1.13)	0.005	----	----	1.05 (1.02, 1.09)	0.004
gender - male	2.81 (1.40, 5.64)	0.004	----	----	2.10 (1.28, 3.44)	0.003
body-mass index	0.92 (0.86, 0.99)	0.025	----	----	----	----
# of medical comorbidities	1.15 (1.01, 1.32)	0.040	----	----	1.14 (1.04, 1.25)	0.005
duration of surgery ≥ two hours	2.53 (1.20, 4.88)	0.006	----	----	1.75 (1.12, 2.74)	0.014
ED to Surgery > 36 hrs	---	---	2.83 (1.24, 6.38)	0.014	---	---
“probable dementia”	N/A		N/A		2.74 (1.72, 4.34)	<0.001