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Table 1 Stages of chronic kidney disease (CKD) was defined according to the presence or absence of kidney damage and level of kidney function, irrespective of the type of kidney disease (diagnos) [43]

From: Testosterone and gonadotropins but not SHBG vary with CKD stages in young and middle aged men

Stage

Description

GFR (ml/min per 1.73 m2)

1

Kidney damage with normal or increased GFR

≥90

2

Kidney damage with mild decreased GFR

60 to 89

3

Moderate decreased GFR

30 to 59

4

Severe decreased GFR

15 to 29

5

Kidney failure

<15 or dialysis

  1. GFR values are normalized to an average surface area of 1.73 m2