Grubb et al reported a simple equation for estimating the glomerular filtration rate (GFR) for a patient using only serum cystatin C and age. The authors are from multiple hospitals in Europe, Japan and the United States.
Parameters:
(1) age in years
(2) serum cystatin C in mg/L, determined by an assay standardized to the international calibrator
estimated GFR in mL per minute per 1.73 square meter BSA =
