What goes into the eGFR (CKD-EPI 2021)
- Creatinine (mg/dL)
- Age (years)
- Sex: Male; Female
How to interpret the result
- G1 ≥ 90 (with other kidney damage), G2 60–89, G3a 45–59, G3b 30–44, G4 15–29, G5 < 15 mL/min/1.73 m²
Clinical pearls
- Only valid when creatinine is stable: not in AKI.
- Add cystatin C when muscle mass is unusual or the decision is high-stakes.
Evidence
- Inker LA, et al. New creatinine- and cystatin C-based equations to estimate GFR without race. N Engl J Med. 2021;385:1737-1749.
Related workups
Related calculators
For education only. Check the inputs and the population the score was validated in before acting on it. Not a substitute for clinical judgment.