The unadjusted overall mortality rate and status on admission across different clinical categories of left ventricular ejection fraction (LVEF) (reduced <40%, mildly reduced 40%–49% and normal ≥50%)
| LVEF <40% (n=210) | LVEF 40%–49% (n=357) | LVEF >50% (n=1009) | P value | |
| Dead at 6 months, n (%) | 42 (20.0) | 31 (8.7) | 33 (3.3) | <0.001 |
| Age | 71.50±12.06 | 70.23±11.95 | 68.45±11.70 | <0.001 |
| Men, n (%) | 147 (70.0) | 250 (70.0) | 692 (68.6) | 0.839 |
| GRACE score | 144.11±34.12 | 128.55±30.88 | 111.83±31.30 | <0.001 |
| Type of ACS, n (%) | <0.001 | |||
| UAP | 6 (2.9) | 29 (8.1) | 176 (17.4) | |
| NSTEMI | 99 (47.1) | 156 (43.7) | 556 (55.1) | |
| STEMI | 105 (50.5) | 172 (48.2) | 277 (27.5) | |
| Killip class, n (%) | <0.001 | |||
| I | 92 (43.8) | 261 (73.1) | 914 (90.6) | |
| II | 62 (29.5) | 61 (17.1) | 67 (6.6) | |
| III | 41 (19.5) | 30 (8.4) | 22 (2.2) | |
| IV | 15 (7.1) | 5 (1.4) | 6 (0.6) |
ACS, acute coronary syndrome;GRACE, Global Registry of Acute Coronary Events; NSTEMI, non-ST-elevation myocardial infarction;STEMI, ST-elevation myocardial infarction; UAP, unstable angina pectoris.