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Endocrine

, Volume 62, Issue 1, pp 136–143 | Cite as

Cognitive functioning and quality of life in patients with Hashimoto thyroiditis on long-term levothyroxine replacement

  • Marina DjurovicEmail author
  • Alberto M. Pereira
  • Johannes W. A. Smit
  • Olga Vasovic
  • Svetozar Damjanovic
  • Zvezdana Jemuovic
  • Dragan Pavlovic
  • Dragana Miljic
  • Sandra Pekic
  • Marko Stojanovic
  • Milika Asanin
  • Gordana Krljanac
  • Milan Petakov
Original Article

Abstract

Objective

Intrinsic imperfections of thyroid hormone replacement therapy may affect long-term general well-being. In patients with Hashimoto thyroiditis (HT), cognitive functioning may be affected via altered thyroid hormones action as well as by the autoimmune process. The aim of this study was to evaluate cognitive function and quality of life (QoL) in patients on long-term levothyroxine replacement for HT in relation to thyroid function tests and TPO (thyroid-peroxidase) antibody (TPOAb) status.

Design

Retrospective cross-sectional study.

Patients and measurements

One-hundred-and thirty patients with HT on long-term levothyroxine replacement and 111 euthyroid control subjects. Both groups were divided into two age subgroups, 20–49 years (N = 59 vs N = 79) and > 50 years (N = 71 vs N = 32). Evaluation included biochemical and neuropsychological tests, evaluating attention, global cognitive status, verbal and working memory, executive function, depression and anxiety, and quality of life. We used ANOVA and partial correlations to test for significant associations.

Results

FT4 (free-thyroxine), FT3 (free-triiodothyronine) levels and FT3/FT4 ratio were not different between patients and controls. Mean TSH (thyroid-stimulating hormone) was normal in all subjects but significantly higher in the patients (20–49 yrs:3.64 ± 2.74 vs 1.93 ± 1.10, >50 yrs:3.93 ± 2.84 vs 1.91 ± 0.90). Antibodies (TgAb,TPOAb) were higher in patients. Global cognitive function (MMSE-Mini mental state examination), conceptual tracking (TMT-Trail Making Test:A/B), verbal divergent thinking (like Phonemic fluency test), and anxiety and depression scores were significantly worse in patients vs controls. QoL was impaired in patients. there was a significant negative correlation between antibodies (TPOAb, TgAb) and quality in life (total SF36 score).

Conclusion

Patients on long-term levothyroxine replacement show persistent impairments in both cognitive functioning and general well-being.

Keywords

Hypothyroidism Cognitive function Quality of life L-thyroxine Long-term replacement Anti-TPO 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Marina Djurovic
    • 1
    Email author
  • Alberto M. Pereira
    • 2
  • Johannes W. A. Smit
    • 3
  • Olga Vasovic
    • 4
  • Svetozar Damjanovic
    • 1
  • Zvezdana Jemuovic
    • 1
  • Dragan Pavlovic
    • 5
  • Dragana Miljic
    • 1
  • Sandra Pekic
    • 1
  • Marko Stojanovic
    • 1
  • Milika Asanin
    • 6
  • Gordana Krljanac
    • 6
  • Milan Petakov
    • 1
  1. 1.Clinic for Endocrinology, Diabetes and Diseases of Metabolism, University Clinical Centre of SerbiaUniversity of BelgradeBelgradeSerbia
  2. 2.Department of Endocrinology and Metabolic Diseases, and Centre for Endocrine Tumors LeidenLeiden University Medical CentreLeidenThe Netherlands
  3. 3.Department of Internal Medicine, Division of EndocrinologyRadboud University Medical CentreNijmegenThe Netherlands
  4. 4.Institute for Gerontology and Palliative Care, BelgradeBelgradeSerbia
  5. 5.Institute of Neurology, University Clinical Centre of SerbiaUniversity of BelgradeBelgradeSerbia
  6. 6.Clinic for Cardiology, University Clinical Centre of SerbiaUniversity of BelgradeBelgradeSerbia

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