Evidence map›Paper›PMID 34634119›Full record

Observational studyThe Journal of clinical endocrinology and metabolism2022

Thyroid Status and Brain Circulation: The Rotterdam Study.

Lana Fani, Oscar Roa Dueñas, Daniel Bos, Meike W Vernooij, Caroline C W Klaver, M Kamran Ikram, Robin P Peeters, M Arfan Ikram, Layal Chaker

Open access · hybridAbstract readObservational Study
In one paragraph

Observational study in The Journal of clinical endocrinology and metabolism, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.6field-weighted citation impact, top 15% 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

16 citing papers in PubMed, 18 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Mapping Thyroid Hormone Action in the Human Brain.Thyroid : official journal of the American Thyroid Association · 2024
    Review
  11. Article
  12. Observational
  13. Article
  14. Review
  15. Thyroid Status and Brain Circulation: The Rotterdam Study.The Journal of clinical endocrinology and metabolism · 2022
    Observational
  16. 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

9 authors at 1 institution in 1 country.

Lana FaniDepartment of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.ORCID 0000-0003-4961-5631
Oscar Roa DueñasDepartment of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
Daniel BosDepartment of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
Meike W VernooijDepartment of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
Caroline C W KlaverDepartment of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
M Kamran IkramDepartment of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
Robin P PeetersDepartment of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
M Arfan IkramDepartment of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
Layal ChakerDepartment of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.ORCID 0000-0001-7855-5418
Erasmus MC · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

contextWhether thyroid dysfunction is related to altered brain circulation in the general population remains unknown.

objectiveWe determined the association of thyroid hormones with different markers of brain circulation within community-dwelling elderly people.

methodsThis was a population-based study of 3 subcohorts of the Rotterdam Study, starting in 1989, 2000, and 2006. A total of 5142 participants (mean age, 63.8 years; 55.4% women), underwent venipuncture to measure serum thyroid-stimulating hormone (TSH) and free thyroxine (FT4). Between 2005 and 2015, all participants underwent phase-contrast brain magnetic resonance imaging to assess global brain perfusion (mL of blood flow/100 mL of brain/minute). Arteriolar retinal calibers were assessed using digitized images of stereoscopic fundus color transparencies in 3105 participants as markers of microcirculation. We investigated associations of TSH, FT4 with brain circulation measures using (non)linear regression models.

resultsFT4 (in pmol/L) levels had an inverse U-shaped association with global brain perfusion, such that high and low levels of FT4 were associated with lower global brain perfusion than middle levels of FT4. The difference in global brain perfusion between high FT4 levels (25 pmol/L) and middle FT4 levels (FT4 = 15 pmol/L; P nonlinearity = .002) was up to -2.44 mL (95% CI -4.31; -0.56). Higher and lower levels of FT4, compared with middle FT4 levels, were associated with arteriolar retinal vessels (mean difference up to -2.46 µm, 95% CI -4.98; 0.05 for lower FT4).

conclusionThese results suggest that thyroid dysfunction could lead to brain diseases such as stroke or dementia through suboptimal brain circulation that is potentially modifiable.

Indexed as

AgedBrainCerebrovascular CirculationFemaleHumansMaleMiddle AgedNetherlandsRisk FactorsStrokeThyroid DiseasesThyroid Function TestsThyroid GlandThyrotropinThyroxineThyrotropinThyroxinebrain perfusioncerebral blood flowcohort studyfree thyroxinegeneral populationthyroid

Identifiers

PMID34634119
PMCPMC8851919
OpenAlexW3206665660

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.