Table 2.
The association between admission serum potassium and 1-year mortality.
| Serum Potassium Level at Admission (mEq/L) | 1-Year Mortality (%) | Univariate Analysis | Multivariate Analysis | ||
|---|---|---|---|---|---|
| HR (95% CI) | p | Adjusted HR (95% CI) | p | ||
| ≤2.9 | 22.6% | 2.34 (1.96–2.79) | <0.001 | 1.67 (1.39–2.01) | <0.001 |
| 3.0–3.4 | 16.4% | 1.66 (1.51–1.82) | <0.001 | 1.36 (1.23–1.49) | <0.001 |
| 3.5–3.9 | 12.1% | 1.16 (1.09–1.24) | <0.001 | 1.19 (1.11–1.26) | <0.001 |
| 4.0–4.4 | 10.6% | 1 (reference) | − | 1 (reference) | − |
| 4.5–4.9 | 12.4% | 1.20 (1.12–1.27) | <0.001 | 1.02 (0.96–1.09) | 0.46 |
| 5.0–5.4 | 18.6% | 1.87 (1.72–2.04) | <0.001 | 1.30 (1.19–1.41) | <0.001 |
| ≥5.5 | 25.8% | 2.84 (2.52–3.20) | <0.001 | 1.62 (1.43–1.83) | <0.001 |
Adjusted for age, sex, race, GFR, principal diagnosis, Charlson comorbidity score, CAD, CHF, PVD, stroke, DM, COPD, cirrhosis, acute kidney injury, mechanical ventilation at admission, admission sodium, chloride, and bicarbonate; HR, hazard ratio.