Table 1:

Definitions of chronic kidney disease according to glomerular filtration rate by the Kidney Disease Outcomes Quality Initiative of the US National Kidney Foundation

StageDescriptionGFR (mL/min/1.73 m2)
1Kidney damage with normal or elevated GFR≥ 90
2Kidney damage with mild decrease in GFR60–89
3*Moderate decrease in GFR30–59
4Severe decrease in GFR15–29
5Kidney failure< 15 (or dialysis)
  • Note: GFR = glomerular filtration rate.

  • * Modified in 2014 to distinguish stage 3a, defined by GFR between 45 mL/min/1.73 m2 and 59 mL/min/1.73 m2, from stage 3b, defined by GFR between 30 and 44 mL/min/1.73m2.