Baseline characteristics of the patients
| With chest pain (n=1661) | Without chest pain (n=421) | p Value | |
| Age (years) | 69.1 (11.8) | 76.6 (10.7) | < 0.001 |
| Female (%) | 35.3 | 54.6 | < 0.001 |
| Previous history | |||
| Recorded (%) | 99.6 | 99.0 | 0.174 |
| Diabetes (%) | 12.2 | 15.3 | 0.090 |
| CCF (%) | 6.9 | 18.6 | < 0.001 |
| Admission characteristics | |||
| Heart rate | 81 (23) | 96 (27) | < 0.001 |
| Blood pressure | 141/83 (31/19) | 130/75 (37/24) | < 0.001 |
| Investigational characteristics | |||
| ST elevation on first ECG | 788/1573 (50%) | 127/372 (34%) | < 0.001 |
| Mean peak CK | 1373 (1403) | 1335 (1678) | 0.693 |
| LV impairment1-150 | 572/1255 (46%) | 170/312 (55%) | 0.005 |
Values are n or mean (SD).
↵1-150 Objective evidence for left ventricular impairment (chestx ray, echocardiogram, nuclear scan, left ventricular angiogram).
CCF, congestive cardiac failure; CK, creatinine kinase; LV, left ventricular.