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Table 2 Stages of chronic kidney disease

From: Performance of Cockcroft-Gault, MDRD, and CKD-EPI in estimating prevalence of renal function and predicting survival in the oldest old

GFR

CKD stage

Description

≥ 60

Stage 1 and 2

Kidney damage with normal or mildly decreased GFR

45–59

Stage 3a

Moderately decreased GFR

30–44

Stage 3b

Moderately decreased GFR

< 30

Stage 4 and 5

Severely decreased GFR or kidney failure

  1. Adapted from K/DOQI clinical practice guidelines [13].
  2. GFR is stated in ml/min/1.73 m2.
  3. CKD stage 3 has been sub-divided into 30–44 (stage 3b) and 45–59 ml/min/1.73m2 (stage 3a) as there is evidence of graded increase in mortality risk [9, 14].