Table 4. Potassium levels and outcomes of STEMI patients after propensity score matching.
VT: ventricular tachycardia; VF: ventricular fibrillation; CI: confidence interval; STEMI: ST-elevation myocardial infarction
| Potassium (mEq/L) | Mortality (%) | Risk ratio (95% CI) | Probability (p) |
| ≤3.4 | 7.2% | 1.694 (1.610, 1.782) | <0.001 |
| 3.5-4.5 | 4.3% | ||
| 4.6-5 | 7.4% | 1.578 (1.507, 1.652) | <0.001 |
| 3.5-4.5 | 4.7% | ||
| ≥5.1 | 12.7% | 2.760 (2.602, 2.928) | <0.001 |
| 3.5-4.5 | 4.6% | ||
| Potassium (mEq/L) | VT (%) | ||
| ≤3.4 | 7.5% | 1.297 (1.238, 1.358) | <0.001 |
| 3.5-4.5 | 5.8% | ||
| 4.6-5 | 6.02% | 0.971 (0.927, 1.016) | 0.203 |
| 3.5-4.5 | 6.2% | ||
| ≥5.1 | 7.1% | 1.156 (1.086, 1.230) | <0.001 |
| 3.5-4.5 | 6.1% | ||
| Potassium (mEq/L) | VF (%) | ||
| ≤3.4 | 5.9% | 1.917 (1.807, 2.034) | <0.001 |
| 3.5-4.5 | 3.1% | ||
| 4.6-5 | 3.1% | 0.999 (0.938, 1.064) | 0.967 |
| 3.5-4.5 | 3.1% | ||
| ≥5.1 | 4.0% | 1.285 (1.182, 1.397) | <0.001 |
| 3.5-4.5 | 3.1% |