What is the possible range of directly measured glomerular filtration rate (mGFR) at a given estimated glomerular filtration rate (eGFR)?

The prediction interval calculator provides the distribution of mGFR at any given eGFR* value. The calculator is available at this link:

• https://mindset.umc.edu/shiny/PredictionInterval/

Further details regarding this calculator are available here:

• Quantifying Individual-Level Inaccuracy in Glomerular Filtration Rate Estimation: A Cross-Sectional Study: Annals of Internal Medicine

*This calculator works for eGFR calculated using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) 2021 creatinine and cystatin C equations and the European Kidney Function Collaboration (EKFC) creatinine equation.