| Variables | N | Frequency (%) | Mean | SD | Median | Q1 | Q3 |
|---|
| Serum sodium (mEq/L) | 120 | | 135.8 | 10.1 | 136.5 | 130.5 | 143.3 |
| Serum sodium ≥135 mEq/L | | 72 (60.0) | | | | | |
| Serum sodium < 135 mEq/L | | 48 (40.0) | | | | | |
| Serum potassium (mEq/L) | 116 | | 4.1 | 0.9 | 4.0 | 3.47 | 4.53 |
| Normal | | 77 (66.4) | | | | | |
| Hypokalemia (< 3.55 mEq/L) | | 32 (27.6) | | | | | |
| Hyperkalemia (> 5.55 mEq/L) | | 7 (6.0) | | | | | |
| Hemoglobin (g/dL)a | 158 | | 12.8 | 3.0 | 12.8 | 10.8 | 14.8 |
| Hemoglobin ≥12 g/dL | | 98 (62.0) | | | | | |
| Hemoglobin < 12 g/dL | | 60 (38.0) | | | | | |
| Hemoglobin < 10 g/dL | | 24 (15.2) | | | | | |
| Serum creatinine (mg/dL) | 145 | | 1.6 | 1.8 | 1.2 | 1.0 | 1.5 |
| Normal serum creatinine ≤1.2 | | 87 (60.0) | | | | | |
| Elevated serum creatinine > 1.2 | | 58 (40.0) | | | | | |
| Blood urea nitrogen (mg/dL) | 62 | | 110.5 | 95.3 | 70.6 | 49.2 | 127.3 |
| Less than 43 mg/dL | | 15 (24.2) | | | | | |
| Elevated ≥43 mg/dL | | 47 (75.8) | | | | | |
| eGFR (mL/min/1.73m2) | 145 | | 74.2 | 33.0 | 74.0 | 55.0 | 92.0 |
| ≤14 | | 8 (5.5) | | | | | |
| 15 to 29 | | 4 (2.8) | | | | | |
| 30 to 59 | | 30 (20.7) | | | | | |
| 60 to 89 | | 61 (42.1) | | | | | |
| ≥90 | | 42 (29.0) | | | | | |
- NB: aMeasurement taken after patient was stabilized Key: eGFR = estimated glomerular filtration rate, SD = standard deviation; Q1 = 25th percentile, Q3 = 75th percentile
