Doctoral Thesis
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- Epidemiologie , Aufmerksamkeitsdefizit-Syndrom , Schilddrüse (1) (remove)
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The association between thyroid function biomarkers and attention deficit hyperactivity disorder
(2023)
The relation between thyroid function biomarkers and attention deficit hyperactivity disorder
(ADHD) in children and adolescents is currently unclear. Cross-sectional data from the German Health
Interview and Examination Survey for Children and Adolescents (KiGGS Baseline) was analyzed
to assess the association between thyroid function biomarkers and ADHD in a population-based,
nationally representative sample. The study cohort included 11,588 children and adolescents with
572 and 559 having an ADHD diagnosis or symptoms, respectively. ADHD symptoms were assessed
through the Inattention/Hyperactivity subscale of the Strength and Difficulties Questionnaire. ADHD
diagnosis was determined by a physician or psychologist. Serum thyroid stimulating hormone (TSH),
free triiodothyronine (fT3), and free thyroxine (fT4) concentrations were determined enzymatically.
Adjusted regression models were used to relate serum TSH, fT3, and fT4 with risk for ADHD diagnosis
or symptoms. In children, a 1 mIU/l higher TSH was related to a 10% lower risk (odds ratio [OR] 0.90;
95% confidence interval [CI] 0.81–1.00) of ADHD diagnosis. We found a significant positive association
between fT3 and continuously assessed ADHD symptoms in children (β 0.08; 95% CI 0.03–0.14).
Our results suggest that physical maturity may influence the association between thyroid function
biomarkers and risk for ADHD.