NKF-KDOQI Chronic Kidney Disease (CKD) Classification

State GFR Description Treatment
1 90+ Normal kidney function Observation, control of blood pressure
2 89-60 Mildly reduced kidney function Observation, control of blood pressure and risk factors
3A
3B
59-45
44-30
Moderately reduced kidney function Observation, control of blood pressure and risk factors
4 29-15 Severely reduced kidney function Planning for endstage renal failure
5 <15
(dialysis)
Kidney failure Treatment choices

CKD is defined as kidney damage or glomerular filtration rate (GFR) < 60 ml/min/1.73 m2 for 3 months or more, irrespective of cause.

References

Levey AS, Eckardt KU, Tsukamoto Y, Levin A, Coresh J, Rossert J, De Zeeuw D, Hostetter TH, Lameire N, Eknoyan G. Definition and classification of chronic kidney disease: a position statement from Kidney Disease: improving Global Outcomes (KDIGO). Kidney Int. 2005 Jun;67(6):2089-100.

CKD-EPI 2009 Equation

GFR = 141 × min(SCr / k, 1)α × max(SCr / k, 1)–1.209 × 0.993 × Age × 1.018 [if Female] × 1.159 [if Black]

Where
SCr is Serum Creatinine [mg/dL]
k is 0.7 for females and 0.9 for males
α is –0.329 for females and –0.411 for males
min is the minimum between SCr / k and 1
max is the maximum between SCr / k and 1