CKiD Under-25 GFR

Name: CKiD Under-25 GFR
Creator: Daniel Diaz-Gil, MD
Keywords: nephrology, renal, GFR, CKiD, kidney, creatinine, cystatin, pediatric, CKD, eGFR

Estimates GFR in children and young adults with CKD using the CKiD U25 2021 equation with creatinine, cystatin C, and BUN

Clinically Verified· 5 tests

Source: Pierce CB, Muñoz A, Ng DK, Warady BA, Furth SL, Schwartz GJ. Age- and sex-dependent clinical equations to estimate glomerular filtration rates in children and young adults with chronic kidney disease. Kidney Int. 2021;99(4):948-956.

For educational and informational purposes only. Verify all results before clinical application.

Sex *

Height *

Serum Creatinine *

mg/dL

Serum Cystatin C *

mg/L

BUN *

mg/dL

References

Pierce CB, Muñoz A, Ng DK, Warady BA, Furth SL, Schwartz GJ. Age- and sex-dependent clinical equations to estimate glomerular filtration rates in children and young adults with chronic kidney disease. Kidney Int. 2021;99(4):948-956.[DOI]

Reviewed by Daniel Diaz-Gil, MD · Last updated March 2026

Medical disclaimer

This tool is for educational and informational purposes only. It is not a substitute for professional clinical judgment. Always independently verify results before making clinical decisions.

Professional Resources — Tools used by pediatricians for renal assessment

Pediatric Nephrology HandbookClinical reference for pediatric kidney disease and electrolytes~$80via Amazon Electrolyte Reference CardQuick-reference for pediatric electrolyte normal values and corrections~$10via Amazon