Instructions

• The pediatric GFR calculator is for use in children under 19 years old. For persons 19 and older, use the GFR calculator for adults.
• If values for cystatin C and/or BUN are not entered, the calculator will generate GFR estimates using the creatinine-based “Bedside Schwartz” equation only (currently considered the best method for estimating GFR in children).
• The cystatin C values are not yet corrected for IFCC calibration and may, therefore, overestimate true cystatin C values. Both cystatin C equations utilize the Siemens (Dade Behring) method for cystatin C.
• These equations are only valid with standardized serum creatinine methods traceable to IDMS.
• For more information about the formulas (including clinical use), see “Additional Information.”