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KDIGO 2012 CLASSIFICATION OF CKD

GLOMERULAR FILTRATION RATE (GFR)
CATEGORY	GFR	EXPLANATION
G1	≥90	Normal or high
G2	60-89	Mild decrease
G3a	45-59	MIld to moderate decrease
G3b	30-44	MIld to severe decrease
G4	15-29	Severe decrease
G5	<15	Kidney failure

ALBUMIN EXCRETION RATE (AER)
CATEGORY	AER mg/24 hr	ACR mg/mmol	ACR mg/g	EXPLANATION
A1	<30	<3	<30	Normal to mild increase
A2	30-300	3-30	30-300	Moderate increase
A3	>300	>30	>300	Severe increase

Adapted from KDIGO - Kidney International Supplements (2013) 3, 19-62.
CKD = Chronic Kidney Disease
GFR = Glomerular Filtration Rate (ml/min/1.72m²)
AER= Albumin excretion rate (mg/24 hours)
ACR =Albumin to creatinine ratio (mg/g or mg/mmol) mg/g.