Baseline characteristics of included patients
| Troponin (ng/ml) | <0.01 | 0.01–0.03 | 0.04–0.1 | >0.1 |
| No (%) | 625 (78.4) | 23 (2.9) | 15 (1.9) | 133 (16.7) |
| Age mean (95% CI) | 57.5 (56.4 to 58.6) | 69.0 (64.0 to 74.0) | 63.7 (54.7 to 72.7) | 63.1 (60.8 to 65.3) |
| Sex (percentage male) | 57.9 | 65.2 | 73.3 | 69.9 |
| Prior myocardial infarction (%) | 151 (24.2) | 11 (47.8) | 3 (20.0) | 29 (21.8) |
| Previous angina (%) | 214 (34.2) | 9 (39.1) | 3 (20.0) | 32 (24.1) |
| Prior coronary intervention (%) | 135 (21.6) | 3 (13.0) | 2 (13.3) | 20 (15.0) |
| Previous hypertension (%) | 309 (49.4) | 17 (73.9) | 10 (66.7) | 63 (47.4) |
| Previous hyperlipidaemia (%) | 309 (49.4) | 13 (56.5) | 7 (46.7) | 50 (37.6) |
| Current smoker (%) | 173 (27.7) | 5 (21.7) | 7 (46.7) | 62 (46.6) |
| ECG consistent with myocardial ischaemia (%) | 112 (17.9) | 9 (39.1) | 4 (26.7) | 101 (75.9) |
| ST elevation myocardial infarction pattern on ECG (%) | 3 (0.5) | 0 (0) | 0 (0) | 57 (42.9) |
| Creatinine on admission mean (95% CI) | 82 (80 to 84) | 117 (95 to 140) | 87 (70 to 103) | 91 (86 to 97) |