Normal GFR in Children and Young Adults

Age Sex Mean GFR ± SD
(ml/min/1.73 m2)
1 week Males and Females 40.6 ± 14.8
2-8 week Males and Females 65.8 ± 24.8
>8 week Males and Females 95.7 ± 21.7
2-12 years Males and Females 133.0 ± 27.0
13-21 years Males 140.0 ± 30.0
13-21 years Females 126.0 ± 22.0

Abbreviations: SD, standard deviation.

References

Heilbron DC, Holliday MA, Al-Dahwi A, Kogan BA. Expressing glomerular filtration rate in children. Pediatr Nephrol 5:5-11, 1991.
Coulthard MG. Maturation of glomerular filtratior in preterm and mature babies. Early Hum Dev 11:281-292, 1985.
Schwartz GJ, Feld LG, Langford DJ. A simple estimate of glomerular filtration rate in full-term infants during the first year of life. J Pediatr 104:849-854, 1984.

Bedside-Schwartz Equation

GFR = k × Height [cm] / SCr [mg/dL]

Where
k = 0.33 for infants 1-52 weeks old preterm
k = 0.45 for infants 1-52 weeks old
k = 0.55 for children 1-13 years old
k = 0.55 for adolescent females 13-18 years old
k = 0.7 for adolescent males 13-18 years old

References

Schwartz GJ, Haycock GB, Edelmann CM Jr, Spitzer A. A simple estimate of glomerular filtration rate in children derived from body length and plasma creatinine. Pediatrics 58:259-263, 1976.