Table 1 Clinical characteristics according to different risk status
Variable | Low-risk group (≤ 3, n = 251) | Moderate-risk group (4–6, n = 509) | High-risk group (≥ 7, n = 269) | P value |
|---|---|---|---|---|
Age, years | 64.0 ± 4.2 | 71.6 ± 6.5 | 73.3 ± 6.5 | < 0.001 |
Female sex, n (%) | 36 (14.3) | 136 (26.7) | 89 (33.1) | < 0.001 |
Diabetes mellitus, n (%) | 58 (23.1) | 142 (27.9) | 83 (30.9) | 0.136 |
Hypertension, n (%) | 147 (58.6) | 322 (63.3) | 156 (58.0) | 0.258 |
Weight, kg | 67.8 ± 9.7 | 61.4 ± 9.8 | 59.5 ± 9.3 | < 0.001 |
Time to admission > 4 h, n (%) | 181 (72.1) | 444 (87.2) | 244 (90.7) | < 0.001 |
Anterior myocardial infarction, n (%) | 78 (31.1) | 224 (44.0) | 169 (62.8) | < 0.001 |
SBP, mmHg | 127.2 ± 17.7 | 126.1 ± 20.8 | 110.7 ± 26.4 | < 0.001 |
DBP, mmHg | 75.6 ± 11.2 | 73.4 ± 12.4 | 67.6 ± 14.4 | < 0.001 |
Heart rate, bpm | 76.4 ± 12.5 | 77.5 ± 13.1 | 86.3 ± 21.0 | < 0.001 |
Killip II–IV, n (%) | 16 (6.4) | 145 (28.5) | 208 (77.3) | < 0.001 |
Serum creatinine, mg/dL | 1.0 (0.8,1.1) | 1.0 (0.8,1.3) | 1.2 (0.9,1.5) | < 0.001 |
Hemoglobin, g/L | 133.1 ± 14.0 | 126.6 ± 15.7 | 124.4 ± 18.8 | < 0.001 |
Creatine kinase MB, U/L | 68.7 (30.4,135.1) | 57.8 (23.8,135.2) | 62.8 (21.3,159.6) | 0.290 |
ALT, U/L | 39.0 (28.4,54.2) | 42.0 (28.1,65.0) | 46.1 (31.0,77.8) | 0.001 |
Total bilirubin, mg/dL | 1.0 ± 0.4 | 1.0 ± 0.4 | 1.1 ± 0.6 | 0.029 |
LVEF, % | 55.0 ± 9.8 | 52.5 ± 11.0 | 46.8 ± 12.2 | < 0.001 |
IABP, n (%) | 10 (4.0) | 55(10.8) | 76 (28.3) | < 0.001 |
Thrombus aspiration, n (%) | 94 (37.5) | 156(30.6) | 82 (30.5) | 0.130 |
Treated vessel, n (%) | ||||
Any left main | 9 (3.6) | 25 (4.9) | 19 (7.1) | 0.185 |
Multi-vessel | 21 (8.4) | 62 (12.2) | 27 (10.0) | |
Others | 221 (88.0) | 422 (82.9) | 223 (82.9) | |
Number of stents | 1.3 ± 0.7 | 1.5 ± 0.8 | 1.4 ± 0.8 | 0.073 |
Hospital stay (days) | 6 (5,7) | 7 (6,10) | 9 (6,14) | < 0.001 |
In-hospital events | ||||
Death | 3 (1.2) | 17 (3.3) | 35 (13.0) | < 0.001 |
Cardiac death | 3 (1.2) | 13 (2.6) | 25 (9.7) | < 0.001 |
MACEs | 14 (5.6) | 55 (10.8) | 65 (24.2) | < 0.001 |