Table 4.

Adjusted logistic regression—with clustering (random effect for physician)

Independent variable	OR	95% CI	P value
Intervention	1.36	(1.10 to 1.68)	0.005
Male sex	0.91	(0.73 to 1.14)	0.42
Patient age	1.00	(0.99 to 1.01)	0.99
Insurance
Private (ref.)
Medicare	1.30	(1.01 to 1.69)	0.05
Medicaid	1.30	(1.01 to 1.65)	0.04
Other	2.47	(1.29 to 4.73)	0.01