Fig. 1

Sample selection. Note: AMI= acute myocardial infarction; CABG = coronary artery bypass grafting; IHD = ischaemic heart disease; PCI = percutaneous coronary intervention. ^#Prior history of IHD refers to either self-reported heart disease from the baseline questionnaire or hospitalisation with any IHD diagnosis before baseline (linked data available from 1 July 2001). *Prior receipt refers to documented receipt of a coronary procedure in linked hospitalisation records (data available from 1 July 2001) before baseline