Growth hormone increases final height in patients with juvenile idiopathic arthritis: data from a randomized

Susanne Bechtold1, Peter Ripperger, Robert Dalla Pozza

  • 1University Children's Hospital, Division of Endocrinology and Diabetology, Munich, Germany. Susanne.Bechtold@med.uni-muenchen.de

Insights

Growth hormone (GH) therapy significantly improves final height in children with juvenile idiopathic arthritis (JIA). This long-term treatment offers a beneficial effect on growth for most affected children.

Area of Science:

  • Pediatric Endocrinology
  • Rheumatology
  • Growth Hormone Therapy

Background:

  • Growth hormone (GH) is known to stimulate growth in children with juvenile idiopathic arthritis (JIA).
  • However, the long-term impact of GH therapy on achieving final adult height in these patients remains unclear.

Purpose of the Study:

  • To investigate the long-term efficacy of growth hormone (GH) therapy on final height in growth-retarded children diagnosed with severe forms of juvenile idiopathic arthritis (JIA).
  • To assess the influence of disease activity on treatment outcomes and identify potential adverse events.

Main Methods:

  • A controlled study involving 31 growth-retarded children with systemic and polyarticular JIA.
  • 13 patients received GH treatment (0.33 mg/kg/week) for a mean of 6.7 years, while 18 served as an untreated control group.
  • Final height was assessed after a mean observational period of 8.4 years.

Main Results:

  • GH-treated patients achieved a mean height increase of 1.6 SD, while the control group experienced a height loss of -0.7 SD.
  • Mean final height was significantly greater in the GH group (-1.6 SD) compared to the control group (-3.4 SD).
  • More GH-treated patients reached their target height (11/13 vs. 4/18). Moderate disease activity correlated with the best outcomes. No adverse events were reported.

Conclusions:

  • Long-term growth hormone (GH) therapy demonstrates a beneficial effect on final height for the majority of growth-retarded children with severe juvenile idiopathic arthritis (JIA).
  • The positive impact on growth is significant even after adjusting for disease activity, with patients experiencing moderate disease activity showing the most benefit.
Abstract

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