Table 5.
Characteristics of patients with acute renal failure, stratified by time of initiation of renal replacement therapy (RRT)
| Characteristic | Early RRT n = 213 | Late RRT n = 65 | P value |
| Age | 62.3 ± 15.5 | 64.6 ± 15.0 | 0.30 |
| Male gender | 126 (59.4) | 44 (68.8) | 0.18 |
| SAPS II | 49.7 ± 17.5 | 45.3 ± 18 | 0.04 |
| SOFA score | 9.2 ± 4.1 | 8.2 ± 3.5 | 0.04 |
| Mechanical ventilation | 166 (77.9) | 61 (93.8) | <0.01 |
| Type of admission | |||
| Medical | 87 (40.8) | 38 (58.5) | 0.01 |
| Surgical | 126 (59.2) | 27 (41.5) | 0.01 |
| Urine output, L/24 hours | 0.18 (0.03–0.50) | 0.47 (0.09–1.74) | <0.001 |
| Creatinine, mg/dL | 3.99 (2.57–6.17) | 3.29 (2.10–5.00) | 0.06 |
| ICU stay, days | 6.1 (2.5–14.8) | 12.2 (8.0–26.5) | <0.001 |
| Hospital stay, days | 25.0 (8.0–46.0) | 27.0 (17.0–45.0) | 0.10 |
| ICU mortality, number (percentage) | 84 (39.4) | 40 (61.5) | <0.01 |
| 60-day mortality, number (percentage) | 94 (44.8) | 42 (64.6) | <0.01 |
Data represent mean ± standard deviation, number (percentage), or median (interquartile range). ICU, intensive care unit; SAPS II, Simplified Acute Physiology Score II; SOFA, sequential organ failure assessment.