Table 3

Coronary angiography rates per 100 AMI patients according to subgroups for patients admitted with AMI in Ontario between 1992 and 1999

	Year of presentation
Variable	1992	1993	1994	1995	1996	1997	1998	1999	OR*	95% CI	p Value
*Odds ratio for angiography between 1992 and 1999.
†Poorer refers to patients with below median socioeconomic status.
‡Sicker refers to patients with higher than median illness severity or predicted 30 day mortality.
CI, confidence interval; OR, odds ratio.
Age
≥65	12.4	13.5	15.5	16.9	18.3	19.1	21.9	24.3	2.27	2.11 to 2.43	<0.0001
<65	39.3	39.5	41.4	44.2	45.0	46.9	50.7	54.4	1.84	1.73 to 1.97	<0.0001
Sex
Women	15.1	17.0	18.0	19.7	21.4	22.2	24.6	26.5	2.03	1.86 to 2.22	<0.0001
Men	27.9	27.6	30.2	32.0	32.4	33.7	37.2	40.8	1.79	1.69 to 1.89	<0.0001
Socioeconomic status
Poorer† than average	22.0	22.4	23.5	25.1	26.3	27.7	30.3	32.3	1.69	1.59 to 1.81	<0.0001
Wealthier than average	24.6	25.3	28.1	29.9	30.3	31.2	35.1	38.7	1.94	1.82 to 2.07	<0.0001
Clinical
Sicker‡ than average	9.5	10.7	12.3	13.4	15.3	15.6	18.3	20.7	2.49	2.28 to 2.71	<0.0001
Healthier than average	37.3	36.9	39.5	42.0	42.8	44.8	49.0	53.1	1.91	1.79 to 2.03	<0.0001
Attending physician
Non-cardiologist	20.3	20.9	21.8	23.1	24.1	24.8	27.7	30.1	1.69	1.59 to 1.79	<0.0001
Cardiologist	32.0	31.7	35.9	38.5	38.2	39.9	43.8	47.1	1.89	1.74 to 2.05	<0.0001
Hospital
No revascularisation facility	21.7	22.4	24.2	26.1	26.6	28.0	31.2	35.1	1.95	1.86 to 2.05	<0.0001
Revascularisation facility	34.7	34.8	37.8	39.1	42.0	43.2	49.8	44.8	1.53	1.29 to 1.81	<0.0001