| Less-intensive (< 35 ml/kg/hour) | More-intensive |  | |
---|---|---|---|---|
 | ≤ 20 ml/kg/hour | 21 to 34 ml/kg/hour | ≥ 35 ml/kg/hour | P |
n (%) | 61 (18) | 202 (60) | 75 (22) | Â |
Male sex (%) | 73.8 | 67.8 | 58.1 | 0.139 |
Age (years) | 59.05 ± 19.0 | 63.48 ± 15.9 | 61.01 ± 17.4 | 0.226 |
Body weight (kg) | 91.66 ± 24.4 | 79.70 ± 18.0 | 68.81 ± 12.8 | < 0.001 |
ICU admission | Â | Â | Â | Â |
   SAPS II | 46 ± 19 | 51 ± 17 | 52 ± 16 | 0.030 |
   SOFA | 9 ± 4 | 10 ± 3 | 11 ± 4 | 0.030 |
   Creatinine (μmol/L) | 106 (88 to 150) | 97 (80 to 150) | 106 (80 to 150) | 0.597 |
   Chronic kidney disease (%) | 47.5 | 58.9 | 55.4 | 0.290 |
Diagnosis | Â | Â | Â | Â |
   Sepsis (%) | 31.2 | 40.1 | 40.5 | 0.419 |
   Post-surgical (%) | 24.6 | 21.3 | 21.6 | 0.859 |
Admission department | Â | Â | Â | Â |
   Emergency (%) | 36.1 | 35.2 | 25.7 | 0.292 |
   Medicine (%) | 16.4 | 23.3 | 32.4 | 0.087 |
   Surgery (%) | 47.5 | 41.6 | 41.9 | 0.702 |
   Hospital to ICU admission (days) | 0.5 (0 to 4) | 1 (0 to 4) | 1 (0 to 3) | 0.654 |
RRT | Â | Â | Â | Â |
   ICU admission to RRT (days) | 2.5 (2 to 8) | 3 (2 to 7) | 2 (1 to 3) | 0.005 |
   RIFLE class at RRT initiation |  |  |  |  |
Risk (%) | 19.7 | 9.9 | 13.5 | 0.123 |
Injury (%) | 18.0 | 27.7 | 35.1 | 0.086 |
Failure (%) | 55.7 | 59.9 | 50.0 | 0.331 |
Non-renal indication (%) | 6.6 | 2.5 | 1.4 | 0.168 |
   SOFA at RRT initiation | 11 ± 3 | 12 ± 3 | 12 ± 3 | 0.068 |
   Creatinine at RRT initiation (μmol/L) | 283 (177 to 389) | 283 (194 to 415) | 221 (168 to 327) | 0.052 |
   CRRT dose (ml/kg/hour) | 15.4 ± 4.2 | 26.9 ± 4.0 | 44.8 ± 9.4 | < 0.001 |
   Start to end RRT (days) | 3 (2 to 6) | 4 (2 to 8) | 2 (1 to 3) | < 0.001 |
Indication for RRT initiation | Â | Â | Â | Â |
   Azotaemia | 65.0 | 70.0 | 63.9 | 0.559 |
   RIFLE class | 56.7 | 70.0 | 56.9 | 0.048 |
   Fluid overload | 61.7 | 62.5 | 59.7 | 0.917 |
   Oliguria | 49.5 | 41.7 | 48.6 | 0.562 |
Outcome | Â | Â | Â | Â |
   ICU mortality (%) | 50.8 | 53.0 | 60.8 | 0.426 |
   Mechanical ventilation (days) | 13 (3 to 23) | 12 (5 to 20) | 5 (2.5 to 13) | < 0.001 |
   ICU length of stay (days) | 17 (7.5 to 29) | 15 (9 to 27) | 8 (4 to 18) | < 0.001 |