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Admission thyroid function testing in elderly patients.

M A Scott, B L Kidd, M S Croxson

    Australian and New Zealand Journal of Medicine
    |October 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

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    Routine thyroid screening in elderly patients is not recommended. Most abnormal free thyroxine index (FTI) results were transient or insignificant, with few patients requiring treatment for undiagnosed thyroid disease.

    Area of Science:

    • Geriatric Medicine
    • Endocrinology
    • Clinical Diagnostics

    Background:

    • Thyroid dysfunction is common in the elderly.
    • Screening for thyroid disease in hospitalized elderly patients is often considered.
    • The clinical utility of routine thyroid screening in this population requires evaluation.

    Purpose of the Study:

    • To assess the diagnostic yield and clinical significance of routine free thyroxine index (FTI) screening in elderly patients admitted to geriatric units.
    • To determine the prevalence of previously undiagnosed thyroid disease identified through screening in this demographic.

    Main Methods:

    • Prospective measurement of the free thyroxine index (FTI) in 307 elderly patients upon admission to two geriatric units.
    • Follow-up investigations for patients with initially abnormal FTI results.

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  • Correlation of screening findings with clinical history and subsequent treatment.

    • Main Results:

    • An initial abnormal FTI was observed in 13.3% of patients (27 raised, 14 low).
    • Further evaluation revealed abnormalities were transient or clinically insignificant in 88% of these cases.
    • Only 1.6% of all patients were treated for previously undiagnosed thyroid disease, with 0.7% identified solely through screening.

    Conclusions:

    • Routine thyroid screening using FTI in elderly hospitalized patients offers limited clinical benefit.
    • The high rate of transient or insignificant abnormalities suggests screening is not cost-effective or necessary in this population.
    • Findings support that thyroid screening is not more justified in the elderly than in younger hospitalized patients.