Table 2.

Acute kidney injury stratification criteria.

AKIN		KDIGO
Serum creatinine	Stage	Stage	Serum creatinine	Urine output
≥0.3 mg/dL increase or increase ×1.5–2 from baseline	1	1	×1.5–1.9 from baseline or ≥0.3 mg/dL increase	<0.5 mL/min/kg ×6–12 h
Increase ×2-3 from baseline	2	2	×2–2.9 from baseline	<0.5 mL/min/kg for ≥12 h
Increase > ×3 from baseline or sCreatinine ≥4 mg/dL with acute increase of at least 0.5 mg/dL	3	3	×3 from baseline or sCreatinine ≥4 mg/dL or renal replacement therapy or eGFR <35 mL/min/1.73m2 in patients <18 yo	<0.3 mL/min/kg for ≥24 h or anuria for ≥12 h

AKIN: Acute Kidney Injury Network; KDIGO: Kidney Disease: Improving Global Outcomes; GFR: glomerular filtration rate; ESKD: end-stage kidney disease.