Table 1: Classification of CKD defined by KDOQI.

StageState of kidney function Classification
by severity by
GFR

1Kidney damage with normal or increasing in GFR GFR 90
2Kidney damage with mild decreasing in GFRGFR of 60–89
3Moderate with decreasing in GFR GFR of 30–59
4Severe with decreasing in GFR GFR of 15–29
5Kidney failureGFR < 15 (or dialysis)