Evidence map›Paper›PMID 34890786›Full record

ArticleEndocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists2022

Brain Fog in Hypothyroidism: Understanding the Patient's Perspective.

Matthew D Ettleson, Ava Raine, Alice Batistuzzo, Samuel P Batista, Elizabeth McAninch, Maria Cristina T V Teixeira, Jacqueline Jonklaas, Neda Laiteerapong, Miriam O Ribeiro, Antonio C Bianco

Open access · greenAbstract read
In one paragraph

Article in Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
4.3field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 40 citations in OpenAlex.

  1. Treatment Preferences in Patients With Hypothyroidism.The Journal of clinical endocrinology and metabolism · 2025
    Pooled it
  2. Article
  3. Review
  4. Article
  5. Article
  6. Variable transduction of thyroid hormone signaling in structures of the mouse brain.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  7. Article
  8. Mapping Thyroid Hormone Action in the Human Brain.Thyroid : official journal of the American Thyroid Association · 2024
    Review
  9. Adaptation and Validation of the Turkish Version of the Brain Fog Scale.International journal of environmental research and public health · 2024
    Article
  10. Article
  11. Article
  12. Brain fog in central disorders of hypersomnolence: a review.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2024
    Review
  13. Article
  14. Critical Approach to Hypothyroid Patients With Persistent Symptoms.The Journal of clinical endocrinology and metabolism · 2023
    Article
  15. Article
  16. Are We Restoring Thyroid Hormone Signaling in Levothyroxine-Treated Patients With Residual Symptoms of Hypothyroidism?Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists · 2023
    Review
  17. Review
  18. Review
  19. Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 5 institutions in 2 countries.

Matthew D EttlesonUniversity of Chicago, Section of Endocrinology, Diabetes, and Metabolism, Chicago, Illinois. Electronic address: Matthew.Ettleson@uchospitals.edu.
Ava RaineCarleton College, Northfield, Minnesota.
Alice BatistuzzoDevelopmental Disorders Program, Center for Biological Sciences and Health, Mackenzie Presbyterian University, Sao Paulo SP, Brazil.
Samuel P BatistaDevelopmental Disorders Program, Center for Biological Sciences and Health, Mackenzie Presbyterian University, Sao Paulo SP, Brazil.
Elizabeth McAninchStanford University Medical Center, Division of Endocrinolgoy, Gerontology, and Metabolism, Stanford Hospital, Stanford, California.
Maria Cristina T V TeixeiraDevelopmental Disorders Program, Center for Biological Sciences and Health, Mackenzie Presbyterian University, Sao Paulo SP, Brazil.
Jacqueline JonklaasGeorgetown University Medical Center, Division of Endocrinology, Washington, DC.
Neda LaiteerapongUniversity of Chicago, Section of General Internal Medicine, Chicago, Illinois.
Miriam O RibeiroDevelopmental Disorders Program, Center for Biological Sciences and Health, Mackenzie Presbyterian University, Sao Paulo SP, Brazil.
Antonio C BiancoUniversity of Chicago, Section of Endocrinology, Diabetes, and Metabolism, Chicago, Illinois.
Universidade Presbiteriana Mackenzie · BRUniversity of Chicago · USCarleton College · USGeorgetown University · USStanford Medicine · US

Funding

Maternal Morbidity and Mortality: Risk Factors, Early Detection and Personalized InterventionUL1TR001409 · NCATS · GEORGETOWN UNIVERSITY · PI GONDRE-LEWIS, MARJORIE C, MELLMAN, THOMAS A · 2015 to 2024
$37.8M
Pilot and Feasibility ProgramP30DK020595 · NIDDK · UNIVERSITY OF CHICAGO · PI Raghavendra G Mirmira · 2013 to 2026
$20.9M
Research Design, Data, and Analytics CoreP30DK092949 · NIDDK · UNIVERSITY OF CHICAGO · PI Ronald T. Ackermann, MARSHALL H CHIN · 2011 to 2026
$10.0M
INTERGRATED CLINICAL AND BASIC ENDOCRINOLOGY RESEARCHT32DK007011 · NIDDK · UNIVERSITY OF CHICAGO · PI Raghavendra G Mirmira · 1986 to 2026
$5.8M
NCATS NIH HHS UL1 TR001409NIDDK NIH HHS P30 DK020595NIDDK NIH HHS P30 DK092949NIDDK NIH HHS T32 DK007011
6 · The paper itself

Abstract

objectivePatient-centered studies have shown that several patients on thyroid hormone replacement therapy for hypothyroidism exhibit persistent symptoms, including "brain fog." Here, we aimed to determine which of these specific symptoms are associated with brain fog, identify patient-reported factors that modify these symptoms, and identify patient concerns related to brain fog not included in thyroid-specific questionnaires.

methodsA survey on brain fog symptoms adapted from thyroid-specific patient-reported outcome was distributed online. Textual data analysis was performed to identify common areas of concern from open-ended survey responses.

resultsA total of 5170 participants reporting brain fog while being treated for hypothyroidism were included in the analysis. Of these, 2409 (46.6%) participants reported symptom onset prior to the diagnosis of hypothyroidism, and 4096 (79.2%) participants experienced brain fog symptoms frequently. Of the symptoms listed, participants associated fatigue and forgetfulness most frequently with brain fog. More rest was the most common factor provided for improving symptoms. The textual data analysis identified areas of concern that are not often included in thyroid-specific quality of life questionnaires, including a focus on the diagnosis of hypothyroidism, the types and doses of medications, and the patient-doctor relationship.

conclusionBrain fog in patients treated for hypothyroidism was associated most frequently with fatigue and cognitive symptoms. Several additional areas of patient concern were found to be associated with brain fog, which are not typically addressed in thyroid-specific questionnaires.

Indexed as

HypothyroidismQuality of LifeBrainHormone Replacement TherapyHumansSurveys and QuestionnairesThyroxineThyroxinebrain fogfatiguehypothyroidismmemory

Identifiers

PMID34890786
PMCPMC8901556
OpenAlexW4200057809

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.