Glomerular filtration rate (eGFR) calculated from serum creatinine can be overestimated in patients with muscle mass deficits.
Aim: The aim of this study was to compare eGFR calculated from serum levels of creatinine and cystatin C in a group of patients with neurogenic bladder due to MMC.
Material and methods: GFR calculations were performed for 67 patients using Schwartz formula for creatinine measured by colorimetric method and Filler formula for cystatin C measured by immunonephelometric method.
Results: Statistically significant lower eGFR values were obtained with calculations based on cystatin C levels.
Conclusion: Cystatin C is a useful marker for GFR estimations in patients with reduced muscle mass.