Evidence map›Paper›PMID 33428804›Full record

ArticleEuropean journal of neurology2021

Chronic migraine: Genetics or environment?

Mona Ameri Chalmer, Andreas Høiberg Rasmussen, International Headache Genetics Consortium, 23andme Research Team, Lisette J A Kogelman, Jes Olesen, Thomas Folkmann Hansen

Open access · hybridAbstract read
In one paragraph

Article in European journal of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
2.0field-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

9 citing papers in PubMed, 2 syntheses or guidelines pooled it, 20 citations in OpenAlex.

  1. Lack of association between TRPV1 gene polymorphisms and risk of migraine chronification: a case-control study and meta-analysis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
    Pooled it
  2. Pooled it
  3. Review
  4. Article
  5. Health equity, care access and quality in headache - part 1.The journal of headache and pain · 2024
    Review
  6. Article
  7. Genetics of migraine: where are we now?The journal of headache and pain · 2023
    Review
  8. Article
  9. High rates of (treated) hypothyroidism among chronic migraine patients consulting a specialized headache clinic: are we missing something?Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
    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

7 authors at 2 institutions in 1 country.

Mona Ameri ChalmerDepartment of Neurology, Danish Headache Center, Copenhagen University Hospital, Glostrup, Denmark.ORCID 0000-0003-4609-1895
Andreas Høiberg RasmussenDepartment of Neurology, Danish Headache Center, Copenhagen University Hospital, Glostrup, Denmark.
International Headache Genetics Consortium
23andme Research Team23andMe, Inc, Sunnyvale, CA, USA.
Lisette J A KogelmanDepartment of Neurology, Danish Headache Center, Copenhagen University Hospital, Glostrup, Denmark.ORCID 0000-0001-9782-7810
Jes OlesenDepartment of Neurology, Danish Headache Center, Copenhagen University Hospital, Glostrup, Denmark.ORCID 0000-0002-6712-2702
Thomas Folkmann HansenDepartment of Neurology, Danish Headache Center, Copenhagen University Hospital, Glostrup, Denmark.ORCID 0000-0001-6703-7762
Copenhagen University Hospital · DKNovo Nordisk Foundation · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe transition from episodic migraine to chronic migraine, migraine chronification, is usually a gradual process, which involves multiple risk factors. To date, studies of the genetic risk factors for chronic migraine have focused primarily on candidate-gene approaches using healthy individuals as controls. AIMS AND

methodsIn this study, we used a large cohort of migraine families and unrelated migraine patients (n > 2200) with supporting genotype and whole-genome sequencing data. We evaluated whether there are any genetic variants, common or rare, with a specific association to chronic migraine compared with episodic migraine.

resultsWe found no aggregation of chronic migraine in families with a clustering of migraine. No specific rare variants gave rise to migraine chronification, and migraine chronification was not associated with a higher polygenic risk score. Migraine chronification was not associated with allelic associations with an odds ratio above 2.65. Assessment of effect sizes with genome-wide significance below an odds ratio of 2.65 requires a genome-wide association study of at least 7500 chronic migraine patients.

conclusionOur results suggest that migraine chronification is caused by environmental factors rather than genetic factors.

Indexed as

Genome-Wide Association StudyMigraine DisordersGenetic Predisposition to DiseaseGenotypeHumansRisk Factorsgeneticsgenotypemigraineneurologysequence analysis

Identifiers

PMID33428804
PMCPMC8247872
OpenAlexW3120334162

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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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.