Table 2.
Baseline characteristics of the derivation and temporal validation cohorts.
| Variables | Derivation cohort AMI2019 (n = 883) | Temporal validation cohort AMI2020 (n = 799) | p value |
|---|---|---|---|
| Age (y) | 61.31 ± 11.19 | 60.54 ± 11.06 | 0.157 |
| SBP (mmHg) | 116.66 ± 24.99 | 115.34 ± 26.63 | 0.293 |
| HR (beats/min) | 81.87 ± 18.20 | 79.94 ± 17.10* | 0.025 |
| CREA (μmol/L) | 83.80 ± 69.63 | 78.41 ± 46.55 | 0.065 |
| TNI (ng/mL) | 5.88 ± 8.27 | 7.45 ± 26.20 | 0.092 |
| CA | 30 (3.40) | 19 (2.38) | 0.275 |
| ST Dev (%) | 672 (76.10) | 654 (81.85)** | 0.005 |
| Killip1 (%) | 784 (88.79) | 684 (85.71) | 0.159 |
| Killip2 (%) | 54 (6.12) | 55 (6.89) | 0.159 |
| Killip3 (%) | 15 (1.70) | 15 (1.88) | 0.159 |
| Killip4 (%) | 30 (3.40) | 44 (5.51) | 0.159 |
| Deceased (%) | 48 (5.44) | 26 (3.25)* | 0.039 |
Compared to AMI2019, *p < 0.05; **p < 0.01; ***p < 0.001.
Continuous values were presented as median ± standard deviation. Categorical values were presented as number (percentage).
SBP, systolic blood pressure; HR, heart rate; CREA, serum creatinine; TNI, troponin I; LVEF, left ventricular ejection fraction; CA, cardiac arrest; ST Dev, ST segment deviation.