Table 1.

Acute kidney injury network staging/classification of acute kidney injury[5]

Stage	Serum creatinine criteria	Urine output criteria
1	Increase in serum creatinine of more than or equal to 0.3 mg/dl (≥26.4 µmol/L) or increase to more than or equal to 150%-200% (1.5-fold-2-fold) from baseline	<0.5 ml/kg per hour for more than 6 h
2	Increase in serum creatinine to more than 200%-300% (>2-fold-3-fold) from baseline	<0.5 ml/kg per hour for more than 12 h
3	Increase in serum creatinine to more than 300% (>3-fold) from baseline (or serum creatinine of more than or equal to 4.0 mg/dl [≥354 µmol/L] with an acute increase of at least 0.5 mg/dl [44 μmol/L])	<0.3 ml/kg per hour for 24 h or anuria for 12 h