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Table 5 Differences in parameters likely to trigger renal replacement therapy (RRT) on reaching maximum RIFLE class between patients with and without RRT (matched patients).

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

  Patients with RRT Patients without RRT P value
Model 1 N = 383 N = 726  
Urea (mmol/L) 15 [10-23] 15 [11-24] 0.3
Creatinine (mmol/L) 217 [158-281] 214 [158-271] 0.4
Potassium (mmol/L) 4.1 [3.6-4.7] 4.1 [3.6-4.6] 0.9
pH 7.34 [7.24-7.44] 7.36 [7.28-7.44] 0.5
mSOFA 7 [5-9] 5 [3-8] < 0.001
SAPS II 50 [38-62] 43 [34-56] < 0.01
Urine output (L) 0.6 [0.2-1.3] 1.4 [0.7-2.5] < 0.001
Fluid accumulation (L) 4 [2-8] 2 [0-6] < 0.01
Model 2 N = 376 N = 754  
Urea (mmol/L) 16 [10-23] 14 [10-22] 0.9
Creatinine (mmol/L) 217 [158-286] 203 [144-265] 0.12
Potassium (mmol/L) 4.1 [3.6-4.8] 4.1 [3.6-4.6] 0.4
pH 7.33 [7.24-7.43] 7.36 [7.27-7.45] 0.3
mSOFA 7 [5-10] 5 [3-8] < 0.001
SAPS II 50 [39-63] 42 [34-54] < 0.001
Urine output (L) 0.6 [0.2-1.2] 1.2 [0.5-2.2] < 0.001
Fluid accumulation (L) 4 [2-8] 2 [1-6] < 0.03
  1. Results are expressed as medians and [interquartile range]. SOFA, Sequential Organ Failure Assessment; mSOFA, SOFA - specific renal component; SAPS, Simplified Acute Physiology Score.