Creatinine criteria Urine Output criteria Stage 1 ↑ Cr x 1.5 or Cr > 0.3 mg/dl UO < 0.5 ml/kg/hr x 6-hr Stage 2 ↑ Cr x 2 UO < 0.5 ml/kg/hr x 12-hr Stage 3 ↑ Cr x 3 or Cr ≥ 4 mg/dl UO < 0.3 ml/kg/hr x 24-hr or anuria × 12-hr ↑: increase vs basal; Cr: creatinine mg/dl; UO: Urine Output; hr: hour

Table 1: AKIN (Acute Kidney Injury Criteria) classification [15].