Table 3.

K/DOQI-CKD classification of the population by CG and MDRD formulasa

mGFRbnStage 1Stage 2Stage 3Stage 4Stage 5
eGFR ≥90eGFR 60 to 89.9eGFR 30 to 59.9eGFR 15 to 29.9eGFR <15
CGMDRDCGMDRDCGMDRDCGMDRDCGMDRD
≥9080764.449.133.847.81.73.10000
60 to 89.951220.912.952.955.926.031.10.20.200
30 to 59.94841.90.617.610.570.972.99.715.900
15 to 29.9275002.50.025.519.661.853.510.226.9
<1513000005.4050.840.043.860.0
  • a Data presented in %. K/DOQI, Kidney Disease Outcomes Quality Initiative; CKD, chronic kidney disease; CG, Cockcroft-Gault formula; MDRD, Modification of Diet in Renal Disease formula; mGFR, measured glomerular filtration rate by renal inulin clearance (ml/min/1.73 m2); eGFR, estimated GFR (ml/min/1.73 m2) by CG or MDRD formula used for CKD classification (stages based on GFR levels alone). Values in bold represent percentage of properly classified estimates by either formula.