Table 2.
Clinical characteristics of the patients on admission.
| 24:00 to <06:00 (n=67) | 06:00 to <12:00 (n=200) | 12:00 to <18:00 (n=328) | 18:00 to <24:00 (n=140) | P value | |
|---|---|---|---|---|---|
| Cardiac arrest on admission | 9 (13.4) | 17 (8.5) | 21 (6.4) | 16 (11.4) | .163 |
| Acute heart failure | 10 (14.9) | 18 (9) | 38 (11.6) | 17 (12.2) | .555 |
| Pulmonary edema | 7 (10.4) | 7 (3.5) | 11 (3.4) | 9 (6.4) | .046 |
| Cardiogenic shock | 12 (17.9) | 14 (7) | 24 (7.3) | 13 (9.4) | .031 |
| Atrioventricular complete block | 5 (7.5) | 11 (5.5) | 12 (3.7) | 2 (1.4) | .132 |
| Ventricular tachycardia | 10 (14.9) | 14 (7) | 29 (8.8) | 15 (10.8) | .238 |
| Ventricular fibrillation | 9 (13.4) | 14 (7) | 22 (6.7) | 11 (7.9) | .298 |
| CPR | 7 (10.4) | 16 (8) | 17 (5.2) | 10 (7.1) | .356 |
| Symptom onset to hospital admission (hours) | 4 (3) | 6 (4) | 6 (5) | 6 (5) | .001 |
| Culprit vessel | |||||
| Left anterior descending artery | 36 (53.7) | 90 (45) | 131 (40) | 72 (51.4) | .199 |
| Right coronary artery | 22 (32.8) | 73 (36.5) | 139 (42.4) | 42 (30) | |
| Circumflex coronary artery | 8 (12) | 33 (16.5) | 55 (17) | 22 (15.7) | |
| Others | 1 (1.5) | 4 (2) | 3 (0.9) | 4 (2.9) | |
| TIMI score | 4 (3) | 4 (3) | 4 (4) | 4 (4) | .519 |
| Killip classification | |||||
| Killip I | 39 (58.2) | 153 (76.5) | 262 (79.9) | 100 (71.4) | |
| Killip II | 11 (16.4) | 26 (13) | 41 (12.5) | 18 (12.9) | |
| Killip III | 7 (10.4) | 6 (3) | 8 (2.4) | 7 (5) | .005 |
| Killip IV | 10 (14.9) | 15 (7.5) | 17 (5.2) | 15 (10.7) | |
| Myocardial infarction classification | |||||
| Anterior | 33 (49.3) | 64 (32) | 102 (31) | 57 (40.7) | |
| Inferior | 24 (35.8) | 74 (37) | 141 (43) | 45 (32) | |
| Inferolateral | 4 (6) | 18 (9) | 40 (12.2) | 10 (7.1) | .006 |
| Anteroseptal | 3 (4.5) | 26 (13) | 25 (7.6) | 10 (7.1) | |
| Other | 2 (3.8) | 18 (9) | 20 (6.1) | 18 (12.9) | |
| Peak highly sensitive troponin I (ng/L) | 50.5 (77.3) | 50.9 (79.5) | 43.0 (78.5) | 66.4 (72.7) | .289 |
| Peak CK-MB (μg/L) | 159 (223) | 170 (237) | 164 (233) | 273 (190) | .053 |
| ECG resolution after intervention | |||||
| <30% | 7 (10.4) | 32 (16) | 43 (13.1) | 9 (6.4) | |
| 30-50% | 0 | 9 (4.5) | 9 (2.7) | 5 (3.6) | |
| 50-70% | 21 (31.3) | 39 (19.5) | 65 (19.8) | 29 (20.7) | .077 |
| >70% | 30 (44.8) | 70 (35) | 132 (40.2) | 59 (42.1) | |
| 100% | 9 (13.4) | 50 (25) | 79 (24.1) | 38 (27.1) |
Data are number (percentage) or median (interquartile range).