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Thyroid function tests in the elderly in the community

H M Hodkinson, M J Denham

    Age and Ageing
    |May 1, 1977
    PubMed
    Summary
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    Thyroid function tests, including serum thyroxine (T4), triiodothyronine (T3) uptake, and free-thyroxine index (FTI), show narrower ranges in well elderly individuals compared to sick elderly patients. Thyroid disease prevalence is similar across both groups.

    Area of Science:

    • Gerontology
    • Endocrinology
    • Clinical Chemistry

    Background:

    • Thyroid hormone levels can vary significantly in elderly populations.
    • Understanding reference ranges is crucial for accurate diagnosis in older adults.

    Purpose of the Study:

    • To compare thyroid function test ranges between well elderly individuals living at home and sick elderly in-patients.
    • To assess the prevalence of thyroid disease in these two distinct elderly cohorts.

    Main Methods:

    • Analysis of serum thyroxine (T4), triiodothyronine (T3) uptake, and free-thyroxine index (FTI) in a cohort of well elderly individuals.
    • Comparison of these ranges with data from sick elderly in-patients.
    • Prevalence assessment of thyroid disease in both groups.

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    Main Results:

    • Demonstrated significantly narrower ranges for T4, T3 uptake, and FTI in well elderly individuals compared to sick elderly in-patients.
    • Observed a similar prevalence of thyroid disease in both the well and sick elderly populations.

    Conclusions:

    • Established distinct reference ranges for thyroid function tests in healthy, community-dwelling elderly.
    • Indicated that while ranges differ, thyroid disease prevalence is comparable between healthy and ill elderly individuals, suggesting other factors influence test results in illness.