Table 1.

Staging of AKI. Adapted from [1]

Stage	Serum creatinine	Urine output
1	1.5–1.9 times baseline OR at least 0.3 mg/dL (26.5 µmol/L) increase	<0.5 mL/kg/h for 6–12 h
2	2.0–2.9 times baseline	<0.5 mL/kg/h for at least 12 h
3	3.0 times baseline OR increase in serum creatinine to at least 4.0 mg/dL (353.6 µmol/L) OR initiation of renal replacement therapy OR in patients aged below 18 years, decrease in eGFR to <35 mL/min/1.73 m2	<0.3 mL/kg/h for at least 24 h OR anuria for at least 12 h