GFR - Schwartz (Pediatric)
Info
Age Preemie infant (<1 year old) Term infant (<1 year old) Child 2-12 years Adolescent
Height
unit cm inch
Gender Male Female
Serum Creatinine
unit mg/dL µmol/L
R e s u l t s
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GFR
 
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GFR - Schwartz (Pediatric)

The Schwartz formula is commonly used for estimation of GFR in infants, children, and adolescents who have normal body functioning.

GFR estimation by this method can performed rapidly with fair accuracy, and it eliminates the need for urine collection.

Formula used:

Schwartz Formula:

GFR (mL/min/1.73 m2) = k (Height) / Serum Creatinine

  • k = Constant
    • k = 0.33 in Preemie Infants
    • k = 0.45 in Term infants to 1 year old
    • k = 0.55 in Children to 13 years
    • k = 0.65 in Adolescent males (Not females because of the presumed increase in male muscle mass. The constant remains .55 for females.)
  • Height in cm
  • Serum Creatinine in mg/dL

Abbreviations:

  • GFR = Glomerular filtration rate

References:
Schwartz GJ, Brion LP, Spitzer A. The use of plasma creatinine concentration for estimating glomerular filtration rate in infants, children, and adolescents. Pediatr Clin North Am. 1987;34(3):571-90.