Baseline characteristics of patients with STEMI
| Secondary hospital (n=2553) | Tertiary hospital (n=2510) | P value | |
| Age, years | 64.2 (54.0–72.0) | 62.0 (51.4–70.0) | <0.001 |
| ≥75 years | 483 (18.9) | 371 (14.8) | <0.001 |
| Women | 693 (27.1) | 541 (21.6) | <0.001 |
| Risk factors | |||
| Hypertension | 1029 (40.3) | 1204 (48.0) | <0.001 |
| Dyslipidaemia | 1297 (50.8) | 1424 (56.7) | <0.001 |
| Diabetes | 382 (15.0) | 503 (20.0) | <0.001 |
| Current smoker | 870 (34.1) | 1133 (45.1) | <0.001 |
| Medical history | |||
| Stroke | 296 (11.6) | 360 (14.3) | 0.004 |
| Ischaemic | 275 (10.8) | 336 (13.4) | 0.004 |
| Haemorrhagic | 26 (1.0) | 32 (1.3) | 0.39 |
| Coronary heart disease | 159 (6.2) | 155 (6.2) | 0.94 |
| Myocardial infarction | 127 (5.0) | 131 (5.2) | 0.69 |
| Percutaneous coronary intervention | 73 (2.9) | 89 (3.6) | 0.17 |
| Coronary artery bypass graft | 3 (0.1) | 4 (0.2) | 0.72 |
| Clinical characteristic | |||
| Transferred in | 79 (3.1) | 1063 (42.4) | <0.001 |
| Hospital approaching method | <0.001 | ||
| Self-transport | 1984 (77.7) | 1630 (64.9) | |
| By ambulance | 530 (20.8) | 866 (34.5) | |
| On site | 39 (1.5) | 14 (0.6) | |
| Prehospital ECG | 340 (13.3) | 710 (28.3) | <0.001 |
| Bypassing the ER | 20 (0.8) | 114 (4.5) | <0.001 |
| Myocardial ischaemia symptoms | <0.001 | ||
| Typical | 2038 (79.8) | 2215 (88.3) | |
| Atypical | 508 (19.9) | 284 (11.3) | |
| No symptom | 7 (0.3) | 11 (0.4) | |
| Cardiac arrest | 52 (2.0) | 102 (4.1) | <0.001 |
| Cardiogenic shock | 192 (7.5) | 125 (5.0) | <0.001 |
| Anterior myocardial infarction | 1452 (56.9) | 1423 (56.7) | 0.90 |
| LBBB | 22 (0.9) | 20 (0.8) | 0.80 |
| Heart rate (beats/min) | <0.001 | ||
| <50 | 149 (5.8) | 80 (3.2) | |
| 50–109 | 2278 (89.2) | 2277 (90.7) | |
| ≥110 | 126 (4.9) | 153 (6.1) | |
| Systolic blood pressure (mm Hg) | <0.001 | ||
| <90 | 151 (5.9) | 95 (3.8) | |
| 90–139 | 1374 (53.8) | 1628 (64.9) | |
| ≥140 | 1028 (40.3) | 787 (31.4) | |
| Length of stay, days | 10 (6–13) | 11 (8–14) | <0.001 |
Data are presented as median (IQR) or n (%).
ECG, electrocardiogram; ER, emergency room; LBBB, left bundle branch block; STEMI, ST elevation myocardial infarction.