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Table 4 Relative risk (RR) for in-hospital mortality using Cox proportional hazards model

From: Late initiation of renal replacement therapy is associated with worse outcomes in acute kidney injury after major abdominal surgery

RIFLE categories Patient number (%) RR* 95% CI P
RIFLE - R 29 (29.6) 1.000 Reference  
RIFLE - I 27 (27.6) 2.121 0.913-4.927 0.080
RIFLE - F 20 (20.4) 3.194 1.262-8.085 0.014
  1. * Adjusted for age ( 65 years vs < 65 years), cardiac failure (with vs without), pre-RRT SOFA scores, and RRT modality (CVVH vs hemodialysis); CVVH = continuous venovenous hemofiltration; 95% CI = 95% confidence interval; RR = relative risk; RRT = renal replacement therapy; SOFA = Sequential Organ Failure Assessment.