Selected baseline and clinical characteristics at presentation, mode of transport and temporal factors for patients with STEMI in Alberta, 2006–2011
| Age ≥75 years (N=646) | Age <75 years (N=2942) | p Value | |
|---|---|---|---|
| Age (year), mean (SD) | 82.2 (5.1) | 57.2 (9.7) | <0.001 |
| Female | 303 (46.9) | 540 (18.4) | <0.001 |
| Prior angina | 182 (28.2) | 506 (17.2) | <0.001 |
| Previous MI | 147 (22.8) | 410 (13.9) | <0.001 |
| Coronary revascularisation | 80 (12.4) | 335 (11.4) | 0.473 |
| Hypercholesterolemia | 264 (40.9) | 1269 (43.1) | 0.292 |
| Hypertension | 437 (67.6) | 1300 (44.2) | <0.001 |
| Diabetes | 126 (19.5) | 519 (17.6) | 0.264 |
| Prior heart failure | 15 (2.3) | 9 (0.3) | <0.001 |
| Atrial fibrillation | 14 (2.2) | 16 (0.5) | <0.001 |
| Smoking | 301(46.6) | 2233 (75.9) | <0.001 |
| Infarct location on first diagnostic ECG | |||
| Anterior | 269 (45.4) | 1137 (43.3) | 0.360 |
| Inferior | 314 (53.0) | 1451 (55.2) | 0.313 |
| Lateral | 138 (23.3) | 760 (29.0) | 0.005 |
| New LBBB | 26 (4.4) | 39 (1.5) | <0.001 |
| Posterior | 41 (6.9) | 229 (8.7) | 0.152 |
| Heart rate (first recorded) bpm | 77 (63–94) | 76 (63–90) | 0.109 |
| Killip class | <0.001 | ||
| I | 246 (77.1) | 1198 (89.1) | |
| II | 42 (13.2) | 76 (5.7) | |
| III | 4 (1.3) | 2 (0.1) | |
| IV | 27 (8.5) | 68 (5.1) | |
| Arrival by ambulance to first hospital | 403 (62.4) | 1139 (38.8) | <0.001 |
| Time from symptom onset to FMC (min) | 93 (40–240) n=499 | 78 (36–182) N=2546 | 0.008 |
| Time from FMC to Fibrinolytic (min) | 57 (39–92) n=150 | 51 (33–80) n=1289 | 0.028 |
| Time from FMC to primary PCI (min) | 166 (106–272) n=214 | 136 (102–208) n=991 | <0.001 |
| Length of stay in hospital (in days) | 6 (4–11) n=626 | 4 (3–7) n=2856 | <0.001 |
Data are presented as n (%).
FMC, first medical contact; LBBB, left bundle branch block; MI, myocardial infarction; PCI, percutaneous coronary intervention.