Complications in patients with AMI by age groups
| Major complications | Age groups | P value | Total sample (n=5530) | |
| 65–74 (n=3709) | 75–84 (n=1821) | |||
| Cardiac arrest in hospital | 403 (10.9%) | 256 (14.1%) | <0.001 | 659 (11.9%) |
| Cardiogenic shock | 253 (6.8%) | 149 (8.2%) | 0.075 | 402 (7.3%) |
| Pulmonary oedema | 172 (4.6%) | 85 (4.7%) | 1 | 257 (4.6%) |
| Bradycardia | 225 (6.1%) | 99 (5.4%) | 0.380 | 324 (5.9%) |
| Ventricular fibrillation | 121 (3.3%) | 50 (2.7%) | 0.336 | 171 (3.1%) |
| Ventricular tachycardia | 149 (4.0%) | 82 (4.5%) | 0.437 | 231 (4.2%) |
| Reinfarction | 92 (2.5%) | 33 (1.8%) | 0.140 | 125 (2.3%) |
| 28-day case fatality | 292 (7.9%) | 209 (11.5%) | <0.001 | 501 (9.1%) |
AMI, acute myocardial infarction.