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[Thyroid dysfunction in old age].

Alexander Iwen

Deutsche Medizinische Wochenschrift (1946)

|September 23, 2021

Summary

Thyroid dysfunction impacts aging populations, with age-specific TSH levels crucial for diagnosis. Treatment for subclinical thyroid issues in older adults requires careful consideration of age and comorbidities.

Area of Science:

Endocrinology
Geriatrics

Background:

Thyroid dysfunctions are prevalent endocrine disorders, disproportionately affecting the aging population.
Physiological changes in thyroid hormone regulation occur with age, impacting thyroid-stimulating hormone (TSH) levels.
Many laboratories lack age-specific reference ranges for TSH, complicating diagnosis in older adults.

Purpose of the Study:

To review age-dependent changes in thyroid physiology and TSH regulation.
To discuss the impact of thyroid dysfunction on comorbidities in older patients.
To outline current European Thyroid Association recommendations for managing subclinical thyroid dysfunction in individuals over 65.

Main Methods:

Literature review focusing on age-related thyroid physiology.
Analysis of European Thyroid Association guidelines for subclinical hyperthyroidism and hypothyroidism in the elderly.

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Discussion of treatment thresholds and monitoring for levothyroxine therapy.

Main Results:

Age-dependent TSH increases necessitate age-specific reference ranges.
Subclinical hyperthyroidism in those >65 requires treatment if TSH < 0.1 mU/l.
Subclinical hypothyroidism in those >65 with TSH > 10 mU/l warrants treatment, especially with cardiovascular issues.

Conclusions:

Management of thyroid dysfunction in older adults requires individualized approaches considering age and comorbidities.
Levothyroxine treatment must be carefully monitored to avoid harmful overdosing.
Treatment for subclinical hypothyroidism with TSH 7-10 mU/l in the elderly is not clearly indicated due to lack of proven mortality/morbidity benefits.