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Table 1 RIFLE Criteria for acute kidney injury

From: High dose intravenous colistin methanesulfonate therapy is associated with high rates of nephrotoxicity; a prospective cohort study from Saudi Arabia

Category Criteria
Risk (R) Increased serum creatinine level by 1.5 times or GFR decrease by >25%
Injury (I) Increased serum creatinine level by 2.0 times or GFR decrease by >50%
Failure (F) Increased serum creatinine level by 3.0 times, GFR decrease by >75% or serum creatinine level ≥354 μmol/L
Loss (L) Persistent acute renal failure or complete loss of function for >4 weeks
End-stage kidney disease (E) End-stage kidney disease for >3 months
  1. GFR = glomerular filtration rate.