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Cognitive functioning and well-being in euthyroid patients on thyroxine replacement therapy for primary
Ellie M Wekking1, Bente C Appelhof, Eric Fliers
1Department of Psychiatry, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands. ewekking@fsw.leidenuniv.nl
European Journal of Endocrinology
|December 3, 2005
Summary
Even with thyroid hormone replacement, individuals with hypothyroidism may experience lasting neurocognitive deficits and reduced psychological well-being. Further research is needed to understand these persistent effects.
Area of Science:
- Endocrinology
- Neuropsychology
- Psychiatry
Background:
- Hypothyroidism is linked to cognitive impairments.
- Thyroid hormone replacement therapy aims to restore euthyroidism.
- Limited data exist on the extent of neurocognitive recovery after treatment.
Purpose of the Study:
- To evaluate neurocognitive function and well-being in patients with primary hypothyroidism on thyroxine (T4) treatment.
- To determine if serum TSH or thyroid antibodies influence neurocognitive outcomes or well-being.
Main Methods:
- Neurocognitive functioning and well-being were assessed in 141 patients with primary hypothyroidism.
- Tests covered cognitive speed, attention, working memory, learning, and memory.
- Well-being was measured using the Symptom Check List-90 and Rand 36-item Health Survey.
Main Results:
- Patients demonstrated impaired performance in several neurocognitive domains, particularly complex attention and verbal memory.
- Psychological well-being scores were significantly lower than in the general population.
- Neither TSH levels nor thyroid antibodies correlated with neurocognitive performance or well-being.
Conclusions:
- Neurocognitive function and psychological well-being may remain suboptimal in treated hypothyroid patients.
- Incomplete recovery suggests potential long-term neurological or psychological effects of hypothyroidism.