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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