Catheterisation laboratory Characteristic Yes No P value No (%) of patients 22 096 (77) 6729 (23) Median (interquartile range) age (years) 66 (55-75) 68 (57-76) <0.001 No (%) of men 14 888 (68) 4232 (63) <0.001 Killip class* (%): I 17 629 (82) 5254 (80) <0.001 (4x2 comparison) II 2745 (13) 995 (15) III 834 (3.9) 308 (4.7) IV 282 (1.3) 46 (0.7) Medical history (%): Stroke 1831 (8.4) 541 (8.1) 0.486 PCI 3818 (17) 557 (8.3) <0.001 CABG 2947 (13) 577 (8.6) <0.001 Coronary angiogram 6603 (31) 1154 (18) <0.001 Positive stress test 2291 (11) 666 (10) 0.215 Myocardial infarction 6633 (30) 2102 (31) 0.07 Hypertension 13 069 (60) 3921 (59) 0.162 Diabetes mellitus 5487 (25) 1559 (23) 0.005 ACS subgroup (%): STEMI 7847 (36) 1986 (30) <0.001 (3x2 comparison) Non-STEMI 6991 (32) 2016 (30) Unstable angina 7258 (33) 2727 (41) Revascularisation (%): PCI 8941 (41) 253 (3.9) <0.001 CABG 1554 (7.1) 46 (0.7) <0.001

ACS=acute coronary syndrome; CABG=coronary artery bypass grafting; CAD=coronary artery disease; non-STEMI=non-ST segment elevation myocardial infarction; PCI=percutaneous coronary intervention; STEMI=ST segment elevation myocardial infarction.

^* Clinical signs of worsening left ventricular function from class I to IV.