Table 3. Multivariate analysis with clinical conditions and medications.

	OR	95%CI	p**
UTI*	4.69	1.13-19.52	0.033
Renal failure	6.52	1.65-25.80	0.007
Cardiac failure	2.16	0.26-17.60	0.470
Dementia	5.24	1.45-18.85	0.011
Morphine	4.25	0.63-28.58	0.136

^*UTI: urinary tract infection;

^**logistic regression method