Objective-To determine whether age, sex, level of deprivation, and area of residence aVect the likelihood of investigation and treatment of patients with coronary heart disease. Design, patients, and interventionsRoutine discharge data were used to identify patients admitted with acute myocardial infarction (AMI) between 1991 and 1993 inclusive. Record linkage provided the proportion undergoing angiography, percutaneous transluminal coronary angioplasty (PTCA), and coronary artery bypass grafting (CABG) over the following two years. Multiple logistic regression analysis was used to determine whether age, sex, deprivation, and area of residence were independently associated with progression to investigation and revascularisation. (Heart 1999;81:252-256) Setting-Mainland

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