Table 1. AKI staging proposed by KDIGO.

This table is adapted from [38]

KDIGO - Kidney Disease Improving Global Outcomes Guidelines

Stage	Serum creatinine	Urine output
1	1.5–1.9-fold baseline or an increase by ≥0.3 mg/dL (≥26.5 µmol/L)	<0.5 mL/kg/h for 6–12 h
2	2.0–2.9-fold baseline	<0.5 mL/kg/h for ≥12 h
3	3-fold baseline or an increase in serum creatinine up to or greater than 4mg/dl or an acute rise by at least 5mg/dl or beginning of renal replacement therapy or a drop in eGFR <35 mL/min/1.73 m2 for patients <18 years	<0.3 mL/kg/h for ≥24 h or anuria ≥12 h