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Psychological well‐being in patients on ‘adequate’ doses of l‐thyroxine: results of a large, controlled community‐based questionnaire study

Saravanan, P., Chau, W.‐F., Roberts, N., Vedhara, K., Greenwood, R., Dayan, C. M.·2002·Clinical Endocrinology

Abstract

Summary: objective Over 1% of the UK population is receiving thyroid hormone replacement with l‐thyroxine (T4). However, many patients complain of persistent lethargy and related symptoms on T4 even with normal TSH levels. To date there has been no large study to determine whether this is related to thyroxine replacement or coincidental psychological morbidity. We have therefore attempted to address this issue using a large, community‐based study. design and patients Computerized prescribing records of five general practices were used to identify 961 patients who had been on thyroxine for a minimum of 4 months from a population of 63 000 (1·5%), along with age‐ and sex‐matched controls. All 1922 individuals were sent a two‐page questionnaire, made up of the short form of the General Health Questionnaire (GHQ‐12), designed to detect minor psychiatric disorders in the community, and a 12‐question ‘thyroid symptom questionnaire’ (TSQ) in the same format. A covering letter explained that we were interested in ‘how patients felt on medication’ and made no direct reference to thyroxine. measurements Scores from the GHQ and TSQ were marked for each individual using the GHQ and Likert scoring methods. Patients’ latest TSH measurements were obtained from laboratory records. Comparisons were then made on scores for the total GHQ‐12, TSQ and individual questions between patients (P) and control (C) groups. Separate analyses were made comparing the patients with a normal TSH (nP) and the control group. results Five hundred and ninety‐seven (62%) of the patients (P) and 551 (57%) of the controls (C) responded and fully completed at least one of the two questionnaire. Three hundred and ninety‐seven responding patients (nP) had a TSH estimation performed in the previous 12 months with the last result being in the local laboratory normal range for TSH (0·1–5·5 or 0·2–6·0 mU/l, according to the assay method used). The responding P, nP and C populations were well matched for age (59·96, 59·73, 59·35 years) and sex (85%, 83%, 87% female). The number of individuals scoring 3 or more on the GHQ‐12 (indicating ‘caseness’) was 21% higher in P than C [185/572 (32·3%) vs. 137/535 (25·6%), P = 0·014] and 26% higher in nP than C [131/381 (34·4%) vs. 137/535 (25·6%), P < 0·005]. Stronger differences were seen with the TSQ scores [C = 187/535 (35·0%), P = 273/583 (46·8%), P < 0·001, P vs. C; and nP = 189/381 (48·6%), P < 0·001, nP vs. C]. Differences existed in chronic drug use and chronic disease prevalence between the control and patient groups, but the differences in GHQ and TSQ scores between the groups remained significant even after correction for these factors as well as age and sex in multiple regression analysis. conclusions This community‐based study is the first evidence to indicate that patients on thyroxine replacement even with a normal TSH display significant impairment in psychological well‐being compared to controls of similar age and sex. In view of the large numbers of people on thyroxine replacement, we believe that these differences, although not large, could contribute to significant psychological morbidity in a substantial number of individuals.

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Crossref · 10.1046/j.1365-2265.2002.01654.x

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  • Patients on levothyroxine display ongoing substantial impairment of psychological wellbeing compared with controls of similar age and sex.

    “Patients on levothyroxine display ongoing substantial impairment of psychological wellbeing compared with controls of similar age and sex.165”

    From Hypothyroidism (2024) · cites this paper as [165]

  • Persistent symptoms in patients treated for hypothyroidism are common.

    “Persistent symptoms in patients treated for hypothyroidism are common.”
  • A proportion of individuals have significant dissatisfaction with levothyroxine, including ongoing significant impairment in psychological well-being compared to controls of similar age and sex.

    “a proportion of individuals have significant dissatisfaction with it, including ongoing significant impairment in psychological well -being compared to controls of similar age and sex. 4 -8”
  • A fraction of LT4-treated hypothyroid patients with normal serum TSH levels remains symptomatic.

    “There is now a consensus that a fraction of the LT4-treated hypothyroid patients with normal serum TSH levels remains symptomatic ( 6 , 7 , 23 , 24 ).”
  • For some patients, the success of LT4 was limited by persistence of residual cognitive symptoms and decrements in quality of life.

    “For some patients, however, the success story was limited by the persistence of residual cognitive symptoms and decrements in the quality of life (5–7).”

    From Emerging Therapies in Hypothyroidism (2024) · cites this paper as [5]

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Authors
Saravanan, P., Chau, W. ‐., Roberts, N., Vedhara, K., Greenwood, R., & Dayan, C. M.
Affiliations
  • Weston General Hospital (GB)
  • Bristol Royal Infirmary (GB)
  • University of Bristol (GB)
Corresponding author
Dayan, C. M.
Venue
Clinical Endocrinology
Publisher
Wiley
Published
2002-10-22
Volume
57
Issue
5
Pages
577-585
ISSN
  • 0300-0664 (ISSN-L)
  • 1365-2265
OpenAlex
W1888479777
Cited by
514
References
33
Citations by year
2026: 12 · 2025: 27 · 2024: 26 · 2023: 30 · 2022: 45 · 2021: 33 · 2020: 37 · 2019: 33 · 2018: 27 · 2017: 26 · 2016: 31 · 2015: 21 · 2014: 25 · 2013: 15 · 2012: 16
FWCI
7.14
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (submittedVersion)
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
levothyroxine, thyroid hormone replacement, psychological well-being, thyroid symptoms, thyroid-stimulating hormone, psychiatric morbidity, lethargy, General Health Questionnaire, community-based study, adverse drug reactions, quality of life
MeSH terms
Adolescent, Adult, Aged, Drug Administration Schedule, Female, Humans, Hypothyroidism, Male, Middle Aged, Psychiatric Status Rating Scales, Surveys and Questionnaires, Regression Analysis, Thyrotropin, Thyroxine, Chi-Square Distribution, Case-Control Studies

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