From: Potential diagnostic biomarkers for chronic kidney disease of unknown etiology (CKDu) in Sri Lanka: a pilot study
Stage of chronic kidney disease
Glomerular filtration rate (mL/min/1.73Â m3)
Stage 1
≥90
Stage 2
60–89
Stage 3
30–59
Stage 4
15–29
Stage 5
<15 (or dialysis)