Table 1.

Universal Definition of AKI.

KDIGO Definition 2012			ADQI Expanded Criteria 2019
Stage	Serum Creatinine	Urine Output	Stage	Biomarker Status
	-	-	1S	Positive
1	•1.5x to 1.9x baseline value OR •Delta increase ≥ 26.5 μmol/L (0.3 mg/dL)	•< 0.5 mL/kg/hour (6 to 12 hours)	1A	Negative
			1B	Positive
2	•2.0x to 2.9x baseline	•< 0.5 mL/kg/hour (≥ 12 hours)	2A	Negative
			2B	Positive
3	•3.0x baseline OR •Delta increase ≥ 353.6 μmol/L (4.0 mg/dL) OR •Initiation of Kidney Replacement Therapy OR •eGFR < 35 mL/minute/1.73m2 if <18 years of age	•< 0.5 mL/kg/hour (≥ 24 hours) OR •Anuria for ≥ 12 hours	3A	Negative
			3B	Positive