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Table 4 Differences in parameters likely to trigger renal replacement therapy (RRT) on reaching maximum RIFLE class between patients with and without RRT (whole cohort).

From: Efficacy of renal replacement therapy in critically ill patients: a propensity analysis

  Patients with RRT
N= 545
Patients without RRT
N= 2301
P value
Urea (mmol/L) 20 [14-28] 14 [10-20] < 0.001
Creatinine (mmol/L) 305 [231-408] 178 [143-247] < 0.001
Potassium (mmol/L) 4.3 [3.8-5.1] 4.2 [3.7-4.7] < 0.001
pH 7.34 [7.24-7.43] 7.36 [7.27-7.44] 0.4
mSOFA 7 [4-10] 5 [2-7] < 0.001
SAPS II 49 [38-62] 41 [32-53] < 0.001
Urine output (L) 0.4 [0.1-1.1] 1.3 [0.6-2.3] < 0.001
Fluid accumulation (L) 4 [2-8] 2 [0-4] < 0.001
  1. Results are expressed as medians and [interquartile range]. SOFA, Sequential Organ Failure Assessment; mSOFA, SOFA - specific renal component; SAPS, Simplified Acute Physiology Score.