Characteristics of the patients with AMI by age groups
| Age groups | P value | Total sample (n=5530) | ||
| 65–74 (n=3709) | 75–84 (n=1821) | |||
| Female sex | 1185 (31.9%) | 831 (45.6%) | <0.001 | 2016 (36.5%) |
| Hypertension | 3060 (82.5%) | 1602 (88.0%) | <0.001 | 4662 (84.3%) |
| Lipid disorder | 2238 (60.3%) | 906 (49.8%) | <0.001 | 3144 (56.9%) |
| Smoking status | ||||
| Smoker | 674 (18.2%) | 121 (6.6%) | 795 (14.4%) | |
| Ex-smoker | 1245 (33.6%) | 533 (29.3%) | 1778 (32.2%) | |
| Never smoker | 1291 (34.8%) | 792 (43.5%) | 2083 (37.7%) | |
| Missing | 499 (13.5%) | 375 (20.6%) | 874 (15.8%) | |
| Glucose level on admission (mg/dL) (median (IQR)) | 92.0 (71.0) | 97.0 (71.0) | 0.521 | 94.0 (70.0) |
| Peak glucose level (mg/dL) (median (IQR)) | 98.0 (60.0) | 95.0 (81) | <0.001 | 97.0 (87.0) |
| Cardiac arrest before hospitalisation | 147 (4.0%) | 41 (2.3%) | 188 (3.4%) | |
| Missing | 220 (5.9%) | 159 (8.7%) | 379 (6.9%) | |
| LVEF <30% | 197 (5.3%) | 169 (9.3%) | 366 (6.6%) | |
| Missing | 987 (26.6%) | 288 (15.8%) | 1275 (23.1%) | |
| Diabetes | 1376 (37.1%) | 721 (39.6%) | 0.077 | 2097 (37.9%) |
| Type of Infarction | ||||
| STEMI | 1189 (32.1%) | 440 (24.2%) | <0.001 | 1629 (29.5%) |
| NSTEMI | 1967 (53.0%) | 898 (49.3%) | 2865 (51.8%) | |
| Bundle branch block | 316 (8.5%) | 220 (12.1%) | 536 (9.7%) | |
| Not defined | 237 (6.4%) | 263 (14.4%) | 500 (9.0%) | |
| Typical symptoms | 2896 (78.1%) | 1218 (66.9%) | 4114 (74.4%) | |
| Missing | 54 (1.5%) | 29 (1.6%) | 83 (1.5%) | |
AMI, acute myocardial infarction; LVEF, left ventricular ejection fraction; NSTEMI, non-ST-elevation myocardial infarction; STEMI, ST-elevation myocardial infarction.