Table 1.
Baseline Characteristics of the Study Population
| Characteristics | Transradial Intervention, n=4696 (%) | Transfemoral Intervention, n=610 (%) | Standardized Difference |
|---|---|---|---|
| Age, mean±SD, y | 57.4±10.0 | 59.5±10.9 | 20.3 |
| Female | 1014 (21.6) | 202 (33.1) | 26.1 |
| Medical history | |||
| Prior myocardial infarction | 815 (17.4) | 142 (23.3) | 14.8 |
| Prior coronary artery bypass grafting | 22 (0.5) | 52 (8.5) | 39.6 |
| Prior percutaneous coronary intervention | 720 (15.3) | 160 (26.2) | 27.1 |
| Stroke | 278 (5.9) | 50 (8.2) | 8.9 |
| Diabetic mellitus | 1211 (25.8) | 173 (28.4) | 5.8 |
| Hypertension | 2952 (62.9) | 393 (64.4) | 3.3 |
| Hyperlipidemia | 2913 (62.0) | 389 (63.8) | 3.6 |
| Diagnosis | |||
| ST‐segment elevation myocardial infarction | 787 (16.8) | 75 (12.3) | 12.7 |
| Non–ST‐segment elevation myocardial infarction | 205 (4.4) | 27 (4.4) | 0.3 |
| Unstable angina | 2268 (48.3) | 307 (50.3) | 4.1 |
| Stable angina | 1264 (26.9) | 173 (28.4) | 3.2 |
| Vital signs | |||
| Heart rate, mean±SD, bpm | 69 (10) | 68 (10) | 9.0 |
| Systolic blood pressure, mean±SD, mm Hg | 128 (17) | 127 (18) | 3.0 |
| Diastolic blood pressure, mean±SD, mm Hg | 79 (20) | 78 (10) | 10.8 |
| Tests at admission | |||
| Left ventricular ejection fraction, mean±SD, % | 62.4±7.3 | 61.7±7.6 | 9.1 |
| Creatinine, mean±SD, μmol/L | 81.9±18.6 | 82.4±21.2 | 2.2 |