Table 1.
Baseline characteristics
| Variable | Total (n = 84) | KAMIR (n = 20) | KorMI (n = 64) | p value |
|---|---|---|---|---|
| Age, yr | 92.3 ± 3.4 | 92.8 ± 5.2 | 92.2 ± 2.6 | 0.629 |
| Female sex | 53 (63.1) | 11 (55.0) | 42 (65.6) | 0.818 |
| Body mass index, kg/m2 | 22.2 ± 2.5 | 21.6 ± 2.8 | 22.3 ± 2.4 | 0.374 |
| History of | ||||
| Hypertension | 43 (51.2) | 7 (35.0) | 36 (56.2) | 0.197 |
| Diabetes mellitus | 12 (14.3) | 1 (5.0) | 11 (17.2) | 0.173 |
| Hyperlipidemia | 2 (2.4) | 1 (5.0) | 1 (1.5) | 0.421 |
| Current smoker | 7 (8.3) | 2 (10.0) | 5 (7.8) | 0.539 |
| Percutaneous coronary intervention | 3 (3.6) | 1 (5.0) | 2 (3.1) | 0.563 |
| Coronary artery bypass grafting | 0 | 0 | 0 | 1.000 |
| Myocardial infarction | 0 | 0 | 0 | 1.000 |
| Comorbidity index score | 0.640 | |||
| 0 | 58 (69.0) | 15 (75.0) | 43 (67.2) | |
| 1–2 | 22 (26.2) | 4 (20.0) | 18 (28.1) | |
| ≥ 3 | 4 (4.8) | 1 (5.0) | 3 (4.7) | |
| Killip class at admission | 0.672 | |||
| I | 42 (50.0) | 10 (50.0) | 32 (50.0) | |
| II | 19 (22.6) | 4 (20.0) | 15 (23.4) | |
| III | 8 (9.5) | 3 (15.0) | 5 (7.8) | |
| IV | 15 (17.9) | 3 (15.0) | 12 (18.8) | |
| Prehospital delay, min | 232 ± 132 | 237 ± 135 | 231 ± 132 | 0.858 |
| Prehospital delay < 6 hr | 71 (84.5) | 16 (80.0) | 55 (85.9) | 0.774 |
| Creatinine at admission, mg/dL | 1.23 ± 0.56 | 1.13 ± 0.54 | 1.26 ± 0.57 | 0.366 |
| Left ventricular ejection fraction on admission, % | 50.8 ± 12.8 | 48.0 ± 16.2 | 51.8 ± 11.3 | 0.362 |
| Peak creatinine kinase-MB, ng/mL | 161.7 ± 146.0 | 174.8 ± 166.9 | 159.5 ± 140.9 | 0.831 |
| Peak troponin I, ng/mL | 63.1 ± 75.6 | 70.8 ± 107.5 | 71.1 ± 88.4 | 0.074 |
| High-sensitivity C-reactive protein, mg/dL | 5.4 ± 13.5 | 3.9 ± 4.9 | 5.9 ± 15.3 | 0.434 |
Values are presented as mean ± SD or number (%).
KAMIR, Korea Acute Myocardial Infarction Registry; KorMI, Korea Working Group on Myocardial Infarction.