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Baseline characteristics of the study population.
| MI, n (%) | Mean age, years (SD) | Died within 28 days, n, (%) | ||
| MALE | First MI | 6.292 (67.0) | 55.4 (6.9) | 1.448 (23.0) |
| Recurrent MI | 3.012 (32.1) | 57.2 (6.2) | 1.584 (52.6) | |
| Insufficient data | 83 (0.9) | 57.2 (6.8) | 69 (83.1) | |
| All | 9.387 | 56.0 (6.8) | 3.101 | |
| FEMALE | First MI | 1.753 (73.8) | 56.4 (6.9) | 377 (21.5) |
| Recurrent MI | 608 (25.6) | 58.1 (6.2) | 307 (50.5) | |
| Insufficient data | 15 (0.6) | 57.1 (6.8) | 11 (73.3) | |
| All | 2.376 | 56.8 (6.8) | 695 | |
SD = standard deviation, n = number
