GFR calculation

eGFR (estimated glomerular filtration rate) is a measure of how well your kidneys are working

C_Cr=

GFR={(140-age)*Weight/Pcr*72}x 0.85 (if female)

C_Cr (creatinine clearance) = mL/minute

Age = years

Weight = kg

SCr (serum creatinine) = mg/dL

Your eGFR is an estimated number based on a blood test and your age, sex, and body type

Staging

The different stages of CKD form a continuum. The stages of CKD are classified as follows :

Stage 1:

Kidney damage with normal or increased GFR (>90 mL/min/1.73 m²)

Stage 2:

Mild reduction in GFR (60-89 mL/min/1.73 m²)

Stage 3a:

Moderate reduction in GFR (45-59 mL/min/1.73 m²)

Stage 3b:

Moderate reduction in GFR (30-44 mL/min/1.73 m²)

Stage 4:

Severe reduction in GFR (15-29 mL/min/1.73 m²)

Stage 5:

Kidney failure (GFR < 15 mL/min/1.73 m² or dialysis)