Association between dementia and elevated TSH: A community-based study

Mary Ganguli, Lynn A. Burmeister, Eric C. Seaberg, Steven Belle, Steven T. DeKosky

Research output: Contribution to journalArticlepeer-review

99 Scopus citations

Abstract

We report on 194 individuals (96 men and 98 women), aged 65 and over, who had dementia assessments and basal TSH measurements as part of an ongoing epidemiological study of dementing disorders in a larger population. Dementia was diagnosed according to DSM-III-R and measured by the Clinical Dementia Rating scale; CDR scores of 0, 0.5, and ≤ 1, represent individuals with no dementia (n = 122), possible dementia (n = 29), and definite dementia (n = 43), respectively. The odds ratio for the association of elevated TSH with definite dementia (CDR ≤ 1) was 3.8 (95% confidence interval = 1.6, 9.1) and with possible and/or definite dementia (CDR ≤ 0.5) was 3.8 (95% confidence interval = 1.6, 9.2), after adjusting for the effects of age, gender, and level of education. This is the first community-based study to report an association between TSH elevation and dementia. Our findings are consistent with recent evidence that subclinical hypothyroidism is associated with cognitive impairment, and that thyroidal state may influence cerebral metabolism.

Original languageEnglish (US)
Pages (from-to)714-725
Number of pages12
JournalBiological psychiatry
Volume40
Issue number8
DOIs
StatePublished - Oct 15 1996
Externally publishedYes

Keywords

  • aging
  • cognition
  • dementia
  • epidemiology
  • thyroid
  • thyrotropin

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