Table 1.

Staging of acute kidney injury (AKI) [14]

Stage	Serum creatinine	Urine output
1	Increase ≥ 0.3 mg/dl (≥ 26 μmol/l) within 48 hrs or increase 1.5 to 1.9 times baseline creatinine serum concentration	< 0.5 ml/kg/hr for > 6 consecutive hrs
2	Increase 2 to 2.9 times the baseline creatinine serum concentration	< 0.5 ml/kg/hr for > 12 hrs
3	Increase ≥ 3 times the baseline creatinine serum concentration or increase ≥ 4.0 mg/dl (≥ 354 μmol/L) serum concentration or initiation of renal replacement therapy	< 0.3 ml/kg/hr for > 24 hrs or anuria for < 12 hrs