An examination of factors influencing the choice of therapy for patients with coronary artery disease

Table 4 Multivariate analysis comparing pairs of treatment groups

	Analysis of maximum likelihood estimates							odds ratio/p-deviance
Parameter	Entry	df	estimate	std. error	Wald χ²	Pr > chi square	std. estimate	point estimate	99% Wald CI	99% Wald CI
(a) Medication vs. PTCA
Constant	0	1	1.131	1.454	0.606	0.437	.
LAD artery disease	1	1	0.970	0.240	16.374	< 0.001	0.536	2.639	1.423	4.894
Previous intervention	2	1	1.093	0.322	11.536	0.001	.	8.896	1.696	46.675
Increasing age	3	1	-0.065	0.021	9.364	0.002	-0.397	0.937	0.887	0.990
Hypertension	4	1	-0.664	0.229	8.373	0.004	.	0.265	0.081	0.864
Angina frequency	5	1	0.883	0.341	6.694	0.010	0.337	2.418	1.004	5.822
(b) PTCA vs. CABG
Intercept	0	1	-1.889	0.710	7.091	0.008	.
SIP: Mobility range	1	1	0.475	0.112	17.868	< 0.001	0.667	1.607	1.204	2.147
Circumflex artery disease	2	1	0.756	0.215	12.345	< 0.001	0.490	2.128	1.223	3.704
Previous intervention	3	1	-1.246	0.337	13.674	< 0.001	.	0.083	0.015	0.469
Higher educational attainment	4	1	-0.661	0.204	10.545	0.001	-0.441	0.516	0.305	0.872
(c) Medication vs. CABG
Intercept	0	1	-8.831	1.548	32.561	< 0.001	.
LAD artery disease	1	1	1.616	0.373	18.804	< 0.001	0.853	5.034	1.927	13.150
Previous cerebral events	2	1	-2.463	0.707	12.127	0.001	.	0.007	0.000	0.277
SIP: Mobility range	3	1	0.620	0.162	14.761	< 0.001	0.870	1.859	1.227	2.818
Circumflex artery disease	4	1	1.095	0.293	13.991	< 0.001	0.661	2.991	1.406	6.359

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