Table 4.
Subgroup analysis: Patients with GFR of <60 mL/min/1.73 m2 (n = 16,710).
| 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 | 32.5% | 1.82 (1.38–2.39) | <0.001 | 1.94 (1.47–2.56) | <0.001 |
| 3.0–3.4 | 23.6% | 1.28 (1.09–1.51) | 0.002 | 1.23 (1.05–1.45) | 0.01 |
| 3.5–3.9 | 22.5% | 1.18 (1.06–1.31) | 0.002 | 1.22 (1.10–1.36) | <0.001 |
| 4.0–4.4 | 19.6% | 1 (reference) | − | 1 (reference) | − |
| 4.5–4.9 | 18.9% | 0.97 (0.88–1.06) | 0.48 | 0.93 (0.84–1.02) | 0.12 |
| 5.0–5.4 | 25.0% | 1.33 (1.18–1.50) | <0.001 | 1.14 (1.01–1.28) | 0.03 |
| ≥5.5 | 29.6% | 1.70 (1.48–1.97) | <0.001 | 1.32 (1.14–1.53) | <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.