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Subclinical hypothyroidism increases the risk for depression in the elderly
Valéria B Chueire1, João H Romaldini, Laura S Ward
1Endocrinology, Department of Medicine, Pontificia Universidade Catolica (PUC), Av. John Boyd Dunlop s/n, 13059-900 Campinas, SP, Brazil. ward@unicamp.br
Archives of Gerontology and Geriatrics
|May 9, 2006
Summary
Subclinical hypothyroidism significantly increases depression risk in older adults. Early thyroid screening is crucial for identifying and managing this risk in the elderly population.
Area of Science:
- Endocrinology
- Geriatrics
- Psychiatry
Background:
- Subclinical hypothyroidism, characterized by elevated serum thyrotropin (TSH) with normal free thyroxine (fT4), is common in the elderly.
- The association between subclinical hypothyroidism and depression in this age group requires further investigation.
Purpose of the Study:
- To investigate whether subclinical hypothyroidism is a risk factor for depression in individuals over 60 years old.
- To determine the prevalence of depression in elderly individuals with elevated TSH levels.
Main Methods:
- A cohort of 323 elderly individuals (≥60 years) were assessed for mood disturbances using the Structured Clinical Interview for DSM-IV.
- Participants were categorized based on serum TSH levels and depression diagnosis.
- Serum TSH, fT4, and thyroid antibodies were measured using sensitive assays and IRMA.
Main Results:
- Depression was diagnosed in 9.5% of individuals with elevated TSH (Group I) and 30.9% of depressed patients (Group II) had elevated TSH.
- Depression was significantly more frequent in subclinical hypothyroidism (49.7%) compared to overt hypothyroidism (16.8%) (p < 0.001).
- Subclinical hypothyroidism was associated with a more than fourfold increased risk of depression (OR = 4.886).
Conclusions:
- Subclinical hypothyroidism is a significant risk factor for depression in the elderly.
- Routine thyroid screening is recommended for elderly individuals to detect subclinical hypothyroidism and mitigate depression risk.
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