Table 1.
Baseline characteristics of patients with ST-elevation myocardial infarction
| CS (Killip IV) (n=1753) |
Non-CS (Killip I–III) (n=14 764) | P value | |
| Age | |||
| 64 years or less | 1214 (71.4%) | 11 141 (77.4%) | <0.001 |
| >65 years | 486 (28.6%) | 3252 (22.6%) | |
| Gender | |||
| Male | 1455 (83.0%) | 12 687 (85.9%) | 0.001 |
| Female | 298 (17.0%) | 2077 (14.1%) | |
| Ethnicity | |||
| Malay | 1113 (63.5%) | 8631 (58.5%) | 0.001 |
| Chinese | 285 (16.3%) | 2632 (17.8%) | |
| Indian | 247 (14.1%) | 2466 (16.7%) | |
| Others | 108 (6.2%) | 1035 (7.0%) | |
| Risk factors | |||
| Smoking (active/ex) | 1109 (67.4%) | 10 020 (70.0%) | 0.028 |
| Diabetes | 732 (51.3%) | 5257 (42.3%) | <0.001 |
| Hypertension | 891 (61.3%) | 7270 (57.2%) | 0.002 |
| Hyperlipidaemia | 372 (32.1%) | 3754 (35.3%) | 0.030 |
| Family history | 158 (9.0%) | 1658 (11.2%) | <0.001 |
| Premorbids | |||
| Cerebrovascular | 49 (3.4%) | 386 (3.1%) | 0.422 |
| Previous MI | 208 (15.1%) | 1553 (12.6%) | 0.009 |
| Peripheral vascular disease | 10 (0.7%) | 35 (0.3%) | 0.007 |
| Chronic kidney disease | 100 (7.1%) | 461 (3.7%) | <0.001 |
| Chronic lung disease | 58 (4.1%) | 285 (2.3%) | <0.001 |
| Myocardial infarct type | |||
| Inferior infarct | 732 (41.8%) | 5310 (36.0%) | <0.001 |
| Anterior infarct | 743 (42.4%) | 6772 (45.9%) | 0.001 |
| LVEF mean±SD | 38.7±12.2 | 46.1±11.1 | 0.025 |
CS, cardiogenic shock; LVEF, left ventricular ejection fraction; MI, myocardial infarction; non-CS, non-cardiogenic shock.