Table 1.
Demographic and clinical features of patients.
| Variable | Intervention group (n = 197) |
Historical control group (n = 405) |
χ 2 (Z) | P value |
|---|---|---|---|---|
| Male gender | 149 (75.6) | 308 (76.0) | 0.01 | 0.91 |
| Age (yrs) | 63.42 ± 11.87 | 63.89 ± 13.20 | −0.49 | 0.63 |
| Hypertension | 109 (55.3) | 214 (52.8) | 0.33 | 0.57 |
| Diabetes | 37 (18.8) | 55 (13.6) | 2.77 | 0.10 |
| Hyperlipidemia | 58 (29.4) | 65 (16.0) | 5.88 | 0.02 |
| Previous coronary disease | 14 (7.1) | 22 (5.4) | 0.66 | 0.42 |
| Previous stroke | 20 (10.2) | 34 (8.4) | 0.01 | 0.93 |
| Current smoker | 106 (53.8) | 196 (48.4) | 4.96 | 0.03 |
| Family history of coronary disease | 16 (8.1) | 65 (16.0) | 10.13 | 0.00 |
| Clinical pattern | ||||
| STEMI | 176 (89.3) | 338 (87.1) | 0.61 | 0.44 |
| NSTEMI | 21 (10.7) | 50 (12.9) | ||
| Cardiac function (Killips classification) | ||||
| Level I | 99 (64.7) | 275 (69.1) | −0.96 | 0.34 |
| Level II | 31 (20.3) | 70 (17.6) | ||
| Level III | 10 (6.5) | 23 (5.8) | ||
| Level IV | 13 (8.5) | 30 (7.5) | ||
| Intravenous thrombolysis | 8 (4.1) | 27 (6.7) | 1.64 | 0.20 |
| Emergency PCI | 189 (95.9) | 378 (93.3) | ||
| Vascular lesions | ||||
| Single | 64 (34.0) | 102 (30.0) | −0.37 | 0.72 |
| Two branch | 56 (29.8) | 116 (34.1) | ||
| Three branch | 65 (34.6) | 122 (35.9) | ||
| Stenosis < 50% | 3 (1.6) | 0 (0.0) | ||
| Stent implantation | 1.19 ± 0.63 | 1.25 ± 0.90 | −0.11 | 0.92 |
Values are given as number of patients (%) or mean ± SD.
STEMI: ST-segment elevation myocardial infarction; NSTEMI: non-ST-segment elevation myocardial infarction.
PCI: percutaneous coronary intervention.