Thyroid stimulating hormone elevation without antithyroid antibody elevation in nursing home patients

Area of Science:

• Endocrinology
• Thyroidology
• Immunology

Background:

• Thyrotropin (TSH) elevation can indicate thyroid dysfunction.
• Antithyroid antibodies are markers of autoimmune thyroid disease.
• The relationship between TSH elevation and antithyroid antibodies requires further investigation.

Purpose of the Study:

• To examine the correlation between elevated antithyroid antibodies and elevated TSH levels.
• To determine the prevalence of antithyroid antibodies in residents with TSH elevation.

Main Methods:

• A cohort of 776 residents from a large state veterans home were screened for TSH elevation.
• 72 residents with elevated TSH and no prior thyroid disease or iodine exposure underwent antibody testing (antithyroglobulin and antimicrosomal).
• Statistical analysis explored the relationship between TSH levels and antibody titers.

Main Results:

• 11% of the total resident population exhibited elevated TSH.
• Among residents with TSH elevation, 32% of men and 64% of women had elevated antithyroid antibodies.
• Higher antithyroid antibody titers were significantly associated with greater TSH elevation.

Conclusions:

• A notable percentage of individuals with TSH elevation, especially women, possess elevated antithyroid antibodies.
• The findings align with previous research indicating TSH elevation without antibody elevation in some cases.
• A hypothesis suggests that involutional thyroid lesions may cause TSH elevation in the absence of detectable antibodies.