Classification of CKD (chronic kidney disease)

Normal kidney function – GFR above 90mL/min/1.73m² and no proteinuria
CKD1 – GFR above 90mL/min/1.73m² with evidence of kidney damage
CKD2  – GFR of 60 to 89 mL/min/1.73m² with evidence of kidney damage
CKD3  – GFR of 30 to 59 mL/min/1.73m²
CKD4  – GFR of 15 to 29 mL/min/1.73m²
CKD5  - GFR less than 15 mL/min/1.73m²
CKD5D - patients with CKD5 and requiring dialysis