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Table 1 Staging of acute kidney injury using KDIGO recommendations

From: Early versus late initiation of renal replacement therapy in critically ill patients with acute kidney injury (The ELAIN-Trial): study protocol for a randomized controlled trial


Serum creatinine criteria

Urinary output criteria


Serum creatinine x 1.5 or serum creatinine rise of 0.3 mg/dl in 48 h

<0.5 ml/kg/h for 6 h


Serum creatinine x 2

<0.5 ml/kg/h for 12 h


Serum creatinine x 3 or serum creatinine ≥4 mg/dl or renal replacement therapy

<0.3 ml/kg/h for 24 h or anuria for 12 h

  1. KDIGO, Kidney Disease: Improving Global Outcomes [6]