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Subclinical thyroid dysfunction symptoms in older adults: cross-sectional study in UK primary care

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McCahon, Deborah, Haque, M Sayeed, Parle, James, Hobbs, FD Richard, Roberts, Lesley M·2020·British Journal of General Practice

Abstract

Background: Subclinical thyroid dysfunction — abnormal serum thyrotrophin (thyroid-stimulating hormone; TSH) concentrations with normal free thyroxine (FT4) is common in older people. It remains unclear whether individuals with subclinical serum status experience an increased symptom profile. Aim: To compare the prevalence of those symptoms typically associated with overt thyroid dysfunction in older individuals with a subclinical and euthyroid serum profile. Design and setting: Cross-sectional study, nested within the Birmingham Elderly Thyroid Study (BETS); from 19 UK general practices. Method: Adults living in a community setting (aged ≥65 years), without overt thyroid dysfunction or associated treatment, self-reported the presence or absence of 18 symptoms (while serum result naïve). Serum concentrations of TSH and FT4 were measured to establish thyroid status. Results: A total of 2870 individuals were screened: 2703 (94%) were categorised as euthyroid (normal), 29 (1%) subclinically hyperthyroid, and 138 (5%) subclinically hypothyroid. Symptoms were common in all groups. No significant differences in the prevalence of individual symptoms were observed between the euthyroid and subclinically hypothyroid groups nor in comparison with the subclinically hyperthyroid group. Multivariate logistic regression analysis failed to reveal an association between individual or multiple symptoms and subclinical status. Conclusion: Findings suggest that subclinical thyroid dysfunction does not confer a symptom burden in older individuals and support adherence to guidelines in the non-treatment of subclinical thyroid dysfunction. GPs may use the findings to reassure older people presenting with symptoms that subclinical thyroid dysfunction is an unlikely explanation. The presence of persistently abnormal TSH concentrations may be linked to long-term risks of cardiovascular disease, especially atrial fibrillation, but whether this should prompt treatment and whether such treatment alters vascular outcomes is unknown.

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  • Symptoms consistent with the presence of hypothyroidism are nonspecific and cannot be reliably used to differentiate those with hypothyroidism from euthyroid people.

    “symptoms consistent with the presence of hypothyroidism are nonspecific and cannot be reliably used to differentiate those with hypothyroidism from euthyroid people. 39 -41”

    From Use of liothyronine (T3) in hypothyroidism: Joint British Thyroid Association/Society for endocrinology consensus statement (2023) · cites this paper as [41]

    The Results and the section on symptom expression and subclinical hypothyroidism report that individual and multiple symptoms did not distinguish euthyroid from subclinically hypothyroid older adults. The claim omits those limits: this study does not establish the same conclusion for hypothyroidism generally or for other age groups. Page numbers are not available in our copy. (LLM, conf=0.86)

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3 of the 26 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. Reuters VS, Buescu A, Reis FA, et al. Clinical and muscular evaluation in patients with subclinical hypothyroidism. [In Portuguese]. Arq Bras Endocrinol Metabol 2006; 50(3): 523-531.

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Authors
McCahon, D., Haque, M. S., Parle, J., Hobbs, F. R., & Roberts, L. M.
Affiliations
  • University of Bristol (GB)
  • University of Warwick (GB)
Venue
British Journal of General Practice
Published
2020-01-13
Volume
70
Issue
692
Pages
e208-e214
ISSN
  • 0960-1643 (ISSN-L)
  • 1478-5242
OpenAlex
W3000435595
Cited by
8
References
26
Citations by year
2026: 1 · 2025: 1 · 2023: 3 · 2022: 1 · 2021: 1 · 2020: 1
FWCI
1.13
Type
journal article
Language
en
Open access
Locations
  • British Journal of General Practice (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Bristol Research (University of Bristol) (publishedVersion, other-oa)
  • Warwick Research Archive Portal (University of Warwick) (acceptedVersion)
Funders
National Institute for Health and Care Research (NF-SI-0611-10273)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Health Sciences › Medicine › Surgery › Thyroid and Parathyroid Surgery
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Cancer Diagnosis and Treatment
Keywords
subclinical thyroid dysfunction, subclinical hypothyroidism, subclinical hyperthyroidism, older adults, thyroid symptoms, thyroid-stimulating hormone, free thyroxine, symptom burden, euthyroid status, primary care
MeSH terms
Age Factors, Aged, Cross-Sectional Studies, Female, United Kingdom, Humans, Male, Primary Health Care, Surveys and Questionnaires, Thyroid Diseases, Thyroid Function Tests, Thyrotropin, Thyroxine, Prevalence, Symptom Assessment

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