Table 1.

Staging of Acute Kidney Injury (AKI) according to KDIGO criteria

Stage	Criteria
Stage 1	One of the following • Serum creatinine increased 1.5–1.9 times baseline
	• Serum creatinine increase >26.5 μmol/L (0.3 mg/dL)
	• Urinary output <0.5 mL/kg/h for 6–12 h
Stage 2	• Serum creatinine increase 2.0–2.9 times baseline
	• Urinary output <0.5 mL/kg/h for more than 12 h
Stage 3	• Serum creatinine increase >3 times baseline
	• Serum creatinine increases to >353.6 μmol/L (4.0 mg/dL)
	• Initiation of renal replacement therapy
	• Urinary output <0.3 mL/kg/h during more than 24 h
	• Anuria for more than 12 h