Growth hormone (GH) dosing during catch-up growth guided by individual responsiveness decreases growth response variability in prepubertal children with GH deficiency or idiopathic short stature

J Clin Endocrinol Metab. 2009 Feb;94(2):483-90. doi: 10.1210/jc.2008-1503. Epub 2008 Nov 11.

Abstract

Context: Weight-based GH dosing results in a wide variation in growth response in children with GH deficiency (GHD) or idiopathic short stature (ISS).

Objective: The hypothesis tested was whether individualized GH doses, based on variation in GH responsiveness estimated by a prediction model, reduced variability in growth response around a set height target compared with a standardized weight-based dose.

Setting: A total of 153 short prepubertal children diagnosed with isolated GHD or ISS (n = 43) and at least 1 SD score (SDS) below midparental height SDS (MPH(SDS)) were included in this 2-yr multicenter study.

Intervention: The children were randomized to either a standard (43 microg/kg.d) or individualized (17-100 microg/kg.d) GH dose.

Main outcome measure: We measured the deviation of height(SDS) from individual MPH(SDS) (diffMPH(SDS)). The primary endpoint was the difference in the range of diffMPH(SDS) between the two groups.

Results: The diffMPH(SDS) range was reduced by 32% in the individualized-dose group relative to the standard-dose group (P < 0.003), whereas the mean diffMPH(SDS) was equal: -0.42 +/- 0.46 and -0.48 +/- 0.67, respectively. Gain in height(SDS) 0-2 yr was equal for the GH-deficient and ISS groups: 1.31 +/- 0.47 and 1.36 +/- 0.47, respectively, when ISS was classified on the basis of maximum GH peak on the arginine-insulin tolerance test or 24-h profile.

Conclusion: Individualized GH doses during catch-up growth significantly reduce the proportion of unexpectedly good and poor responders around a predefined individual growth target and result in equal growth responses in children with GHD and ISS.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biomarkers, Pharmacological / analysis
  • Body Height / drug effects
  • Child
  • Child Development / drug effects*
  • Child, Preschool
  • Dose-Response Relationship, Drug
  • Drug Monitoring / methods
  • Dwarfism, Pituitary / drug therapy*
  • Dwarfism, Pituitary / physiopathology
  • Female
  • Growth Disorders / drug therapy*
  • Growth Disorders / physiopathology
  • Human Growth Hormone / administration & dosage*
  • Human Growth Hormone / deficiency
  • Humans
  • Individuality*
  • Male
  • Parents
  • Population
  • Puberty / drug effects
  • Sex Characteristics

Substances

  • Biomarkers, Pharmacological
  • Human Growth Hormone