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Thyrotropin reference interval in older adults.

Xiaodan Zhai, Yongze Li, Xiaochun Teng

    Endocrine Connections
    |November 19, 2024
    PubMed
    Summary
    This summary is machine-generated.

    Thyrotropin levels naturally change with age. This review suggests a higher thyrotropin threshold may be appropriate for diagnosing subclinical hypothyroidism in older adults.

    Keywords:
    hypothyroidismolder adultsreference intervalthyrotropin

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    Area of Science:

    • Gerontology
    • Endocrinology
    • Thyroid Research

    Background:

    • The global population aged 65 and above is projected to reach 16% by 2050.
    • Thyroid disorders are a growing concern in the elderly population.
    • Thyrotropin (TSH) is a sensitive marker for thyroid function, crucial for diagnosing subclinical thyroid disease.

    Purpose of the Study:

    • To review existing literature on thyrotropin reference intervals in older adults.
    • To explore the distinction between adaptive and pathological thyrotropin level variations in the elderly.
    • To inform diagnostic and treatment thresholds for thyroid dysfunction in aging populations.

    Main Methods:

    • Systematic literature review of studies on thyrotropin reference intervals in elderly populations.
    • Analysis of factors contributing to variations in thyrotropin ranges among older adults.
    • Synthesis of current research on age-related changes in thyroid function markers.

    Main Results:

    • Thyrotropin levels may be slightly elevated in older individuals.
    • Higher upper limits of reference intervals for thyrotropin have been observed in elderly cohorts.
    • Population heterogeneity likely contributes to the wide variation in reported thyrotropin ranges.

    Conclusions:

    • Age-related changes in thyrotropin necessitate a re-evaluation of diagnostic criteria.
    • A higher thyrotropin threshold for diagnosing subclinical hypothyroidism in the elderly appears reasonable.
    • Further research is needed to establish precise, age-specific reference intervals for thyrotropin.