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Table 1 Staging of acute kidney injury

From: Diagnosis, evaluation, and management of acute kidney injury: a KDIGO summary (Part 1)

Stage Serum creatinine Urine output
1 1.5 to 1.9 times baseline or ≥0.3 mg/dl (≥26.5 μmol/l) increase <0.5 ml/kg/hour for 6 to 12 hours
2 2.0 to 2.9 times baseline <0.5 ml/kg/hour for ≥12 hours
3 3.0 times baseline or increase in serum creatinine to ≥4.0 mg/dl (≥353.6 μmol/l) or initiation of renal replacement therapy or in patients <18 years a decrease in eGFR to <35 ml/minute per 1.73 m2 <0.3 ml/kg/hour for ≥24 hours or anuria for ≥12 hours
  1. eGFR, estimated glomerular filtration rate