PCI centre | Non-PCI centre | Total | χ2, p-value | ||
Age (years) | |||||
35–59 | n | 483 | 65 | 548 | 0.03, 0.872 |
% | 48.5 | 49.2 | 48.6 | ||
60–75 | n | 513 | 67 | 580 | |
% | 51.5 | 54.5 | 51.4 | ||
Sex | |||||
Female | n | 224 | 32 | 256 | 0.20, 0.651 |
% | 22.5 | 24.2 | 22.7 | ||
Male | n | 772 | 100 | 872 | |
% | 77.5 | 81.3 | 77.3 | ||
STEMI | |||||
No | n | 267 | 78 | 345 | 56.43, <0.001* |
% | 26.8 | 59.1 | 30.6 | ||
Yes | n | 723 | 54 | 777 | |
% | 72.6 | 40.9 | 68.9 | ||
Missing | n | 6 | 0 | 6 | |
% | 0.6 | 0 | 0.53 | ||
Transported directly† | |||||
No | n | 312 | 66 | 378 | 18.24, <0.001 |
% | 31.3 | 50 | 33.5 | ||
Yes | n | 684 | 66 | 750 | |
% | 68.7 | 50 | 66.5 | ||
Transported by EMS | |||||
No | n | 301 | 69 | 370 | 25.71, <0.001 |
% | 30.2 | 52.3 | 32.8 | ||
Yes | n | 695 | 63 | 758 | |
% | 69.8 | 47.7 | 67.2 | ||
Pre-hospital delay‡ | |||||
<12 hours | n | 590 | 52 | 642 | 68.51, <0.001 |
% | 59.2 | 39.4 | 56.9 | ||
12–48 hours | n | 175 | 25 | 200 | |
% | 17.6 | 18.9 | 17.7 | ||
>48 hours | n | 79 | 41 | 120 | |
% | 7.9 | 31.1 | 10.6 | ||
Missing | n | 152 | 14 | 166 | |
% | 15.3 | 10.6 | 14.7 | ||
Total | n | 996 | 132 | 1128 | |
% | 88.3 | 11.7 | 100 |
*Fisher’s exact test
†Directly to hospital of definitive treatment (where patient in analysis sample was both finally treated for suspected AMI and recruited to study).
‡Delay from symptom onset to admission to hospital of definitive treatment.
AMI, acute myocardial infarction; EMS, emergency medical service; MAMIR, Management of Acute Myocardial Infarction in Russia; PCI, percutaneous coronary intervention; STEMI, ST-elevation myocardial infarction.