Stage

Description

GFR (ml/min/1.73 m2)

I

Kidney damage with normal

or increased GFR

≥90

II

Kidney damage with mildly

decreased GFR

60-89

III

Moderately decreased GFR

30-59

IV

Severely decreased GFR

15-29

V

Kidney failure

<15 or dialysis
*Chronic kidney disease: either kidney damage or glomerular filtration rate (GFR)<60 ml/min/1.73 m2
for > 3 months. Kidney damage is defined as pathological abnormalities or markers of damage including abnormalities in blood or urine tests or imaging studies
Table 4: Definition and stages of chronic kidney disease* based on kidney disease outcomes quality initiatives (K/DOQI) guidelines [54].