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Table 1 Stages of chronic kidney disease (CKD) related to levels of kidney function, i.e., glomerular filtration rate (GFR) (National Kidney Foundation, 2002)

From: Health-related quality of life in different stages of chronic kidney disease and at initiation of dialysis treatment

CKD stage Description GFR (ml/min/1.73 m2)
1 Kidney damage with normal or increased kidney function ≥ 90
2 Kidney damage with mildly diminished kidney function 60 – 89
3 Moderately reduced kidney function 30 – 59
4 Severely decreased kidney function 15 – 29
5 Kidney failure < 15