Baseline characteristics of 2568 patients presenting with cardiac chest pain
| Parameter | Primary diagnosis; no. (%) of patients or mean ± SD | p value† | ||
|---|---|---|---|---|
| All n = 2568 | Stable angina n = 1339 | Acute coronary syndrome n = 1229 | ||
| Age, yr | 68.4 ± 11.2 | 68.4 ± 9.9 | 68.3 ± 12.4 | 0.7 |
| Male sex | 1905 (74.2) | 1025 (76.5) | 880 (71.6) | 0.005 |
| BMI,* kg/m2 | n = 1336 27.7 ± 4.6 | n = 662 28.2 ± 4.8 | n = 674 27.3 ± 4.5 | < 0.001 |
| Left ventricular impairment | ||||
| None | 1259 (50.8) | 750 (57.9) | 509 (43.0) | < 0.001 |
| Mild | 577 (23.3) | 282 (21.8) | 295 (24.9) | |
| Moderate | 402 (16.2) | 160 (12.4) | 242 (20.4) | |
| Severe | 242 (9.8) | 103 (8.0) | 139 (11.7) | |
| Coronary artery disease | n = 940 | n = 547 | n = 393 | 0.4 |
| No. of affected coronary vessels per patient | 2.3 ± 0.8 | 2.3 ± 0.8 | 2.3 ± 0.8 | |
| Underwent coronary intervention | 919 (97.7) | 526 (96.2) | 393 (100.0) | < 0.001 |
| Type of intervention performed | ||||
| PTCA only | 18 (2.0) | 17 (3.2) | 2 (0.5) | < 0.001 |
| Bare metal stent | 790 (86.0) | 503 (95.6) | 286 (72.7) | |
| Drug-eluting stent | 79 (8.6) | 3 (0.6) | 76 (19.3) | |
| Both types of stents | 31 (3.4) | 3 (0.6) | 29 (7.4) | |
| C-reactive protein, mg/L | n = 1998 37 ± 63 | n = 876 14 ± 30 | n = 1122 56 ± 74 | < 0.001 |
| Creatine kinase, U/L | n = 2272 521 ± 1259 | n = 1106 145 ± 246 | n = 1166 877 ± 1666 | < 0.001 |
| Troponin I, μg/L | n = 2553 16.6 ± 60.7 | n = 1339 0.8 ± 7.3 | n = 1214 33.7 ± 84.5 | < 0.001 |
| Creatinine, μmol/L | n = 2326 110.2 ± 73.1 | n = 1160 105.0 ± 66.2 | n = 1166 115.4 ± 79.0 | < 0.001 |
Note: BMI = body mass index, PTCA = percutaneous transluminal coronary angioplasty, SD = standard deviation.
↵* BMI values were available for 1336 patients (662 with stable angina and 674 with acute coronary syndrome).
↵† For comparison between patients with stable angina and those with acute coronary syndrome (analysis of variance, Student t-test or χ2 test).