Table 2.

Equations to predict GFR using cystatin Ca

Reference (No. and Type of Subject)Formula
Fillerb (12) (n = 536, children with various renal disorders)Log (GFR) = 1.962 + [1.123 × log (1/cystatin C)]
Le Briconb (10) (n = 25, renal transplant)GFR = [(78) × (1 / cystatin C)] + 4
Hoekb (11) (n = 123, adults with suspected renal disease)GFR = −4.32 + (80.35 × 1/cystatin C)
Larssonc (13) (n = 100, adults and children referred for iohexol clearance study)GFR = 77.24 × (cystatin C−1.2623)
  • a Cystatin C in mg/L.

  • b GFR expressed as ml/min per 1.73 m2

  • c GFR expressed as ml/min.