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Hyperthyrotropinemia in obese children is reversible after weight loss and is not related to lipids

Thomas Reinehr1, Gideon de Sousa, Werner Andler

  • 1Vestische Kinder- und Jugendklinik, University of Witten/Herdecke, Dr. F. Steiner Strasse 5, 45711 Datteln, Germany. T.Reinehr@kinderklinik-datteln.de

The Journal of Clinical Endocrinology and Metabolism
|May 11, 2006
PubMed

Insights

Hyperthyrotropinemia in obese children is likely a consequence of obesity, not a cause. Weight loss significantly reduced thyroid hormones, suggesting thyroxine treatment may not be necessary.

Area of Science:

  • Pediatric Endocrinology
  • Metabolic Disorders
  • Thyroidology

Background:

  • Controversy exists regarding thyroxine (T4) treatment for obese individuals with hyperthyrotropinemia.
  • Understanding the relationship between obesity and thyroid function is crucial for appropriate clinical management.

Purpose of the Study:

  • To investigate whether hyperthyrotropinemia is a cause or a consequence of obesity in children.
  • To assess the impact of weight loss on thyroid hormone levels in obese children.

Main Methods:

  • A cross-sectional study comparing 246 obese and 71 lean children, with a 1-year follow-up.
  • Intervention involved exercise, behavior therapy, and nutrition education.
  • Measured thyroid-stimulating hormone (TSH), free triiodothyronine (fT3), free thyroxine (fT4), and lipid profiles.

Main Results:

  • Obese children had significantly higher TSH and fT3 levels compared to lean children; fT4 levels did not differ.
  • Weight loss in a subset of obese children led to a significant reduction in TSH and fT3.
  • Thyroid hormones and lipid profiles showed no significant correlations.

Conclusions:

  • Elevated TSH and fT3 in obese children appear to be a consequence of obesity, particularly as weight loss normalized these levels.
  • The findings suggest that thyroxine treatment may not be indicated in obese children with hyperthyrotropinemia, as thyroid dysfunction is secondary to obesity and not associated with adverse lipid profiles.
Abstract

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