Table 1

GFR Category GFR (ml/min/1.73m²) Terms
G1	≥ 90	Normal or High
G2	60-89	Mildly decreased*
G3a	45-59	Mildly or moderately decreased
G3b	30-44	Moderately or severely decreased
G4	15-29	Severely decreased
G5	<15	Kidney failure

Abbreviations: CKD: Chronic Kidney Disease; GFR: Glomerular Filtration Rate
*Relative to young adult level
In the absence of evidence of kidney damage, neither GFR category G1 nor G2 fulfill the criteria for CKD Reprinted by Permission from Nature Publishing Group, KDIGO 2012 Clinical Practice Guidelinefor the Evaluation and Management of Chronic Kidney Disease, Kidney International supplement 3: 27, table 5, Copyright (2013)

Table 1: Categories of GFR: addition of G3a and G3b.