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Published on: July 10, 2017
Sex-modulated association between thyroid stimulating hormone and informant-perceived anxiety in non-depressed older
Asma Hallab1,2,3
1Biologie Intégrative et Physiologie - Neurosciences Cellulaires et Intégrées, Faculté des Sciences et Ingénierie, Sorbonne Université, Paris, France. asma.hallab@charite.de.
Abstract:
The aim of this study was to assess the association between thyroid function and perceived anxiety in non-depressed older adults. Non-depressed Alzheimer's Disease Neuroimaging Initiative (ADNI) participants with complete Thyroid Stimulating Hormone (TSH) and neuropsychiatric inventory (NPI/NPI-Q) were included. The association between anxiety and thyroid function was assessed by logistic regression and sex stratification. Restricted cubic splines were applied to evaluate non-linearity in the association. The median age of 2,114 eligible participants was 73 years (68-78), 1,117 (52.84%) were males, and the median TSH was 1.69 µIU/mL. There was a significant association between TSH and informant-perceived anxiety in the total study population (ORModel1 = 0.86, 95%CI 0.76-0.97, p = 0.011), even after adjusting for bio-demographical (adj.ORModel2 = 0.85, 95%CI 0.75-0.96, p = 0.007), and socio-cognitive confounders (adj.ORModel3 = 0.84, 95%CI 0.73-0.96, p = 0.009). Sex-stratification showed similar significant results in all male-specific models (ORModel1-male = 0.71, 95%CI: 0.58-0.85, pModel1-male < 0.001). In the general population and males, a TSH value of 2.4 µIU/dL was a significant cutoff under which anxiety odds were significantly high, even after adjusting for confounders. The sex-dependent association between TSH levels and perceived anxiety in non-depressed older adults is a novel finding that has to be further explored for a better understanding of the underlying neurobehavioral biology.
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