Table 3 Binary logistic regression analysis of the risk of major adverse cardiovascular events within 30 days of percutaneous coronary intervention, Scotland, 1997–2003.

	Crude		Adjusted for case mix* and year
	OR (95% CI)	p Value	OR (95% CI)	p Value
All‐cause death
Low volume	1.00		1.00
Medium volume	0.72 (0.54 to 0.95)	0.022	1.25 (0.75 to 2.06)	0.390
High volume	0.74 (0.51 to 1.07)	0.108	0.88 (0.34 to 2.25)	0.783
Acute myocardial infarction
Low volume	1.00		1.00
Medium volume	0.66 (0.53 to 0.82)	<0.001	0.90 (0.64 to 1.27)	0.561
High volume	0.51 (0.37 to 0.70)	<0.001	0.73 (0.36 to 1.46)	0.372
Coronary artery bypass grafting
Low volume	1.00		1.00
Medium volume	0.47 (0.35 to 0.65)	<0.001	0.46 (0.29 to 0.73)	0.001
High volume	0.21 (0.11 to 0.38)	<0.001	0.18 (0.07 to 0.54)	0.002
Any MACE
Low volume	1.00		1.00
Medium volume	0.61 (0.51 to 0.73)	<0.001	0.71 (0.54 to 0.93)	0.013
High volume	0.45 (0.35 to 0.59)	<0.001	0.46 (0.27 to 0.80)	0.006

*Model adjusted for age, sex, urgency, indication, number of stenosed arteries, left ventricular impairment, previous coronary revascularisation, diabetes, smoking status, obesity, hypertension, hyperlipidaemia and deprivation quintile.

MACE, major adverse cardiovascular event; OR, odds ratio.