Evidence map›Paper›PMID 21398421›Full record

ArticleCephalalgia : an international journal of headache2011

Migraine features, associated symptoms and triggers: a principal component analysis in the Women's Health Study.

Markus Schürks, Julie E Buring, Tobias Kurth

Abstract read
In one paragraph

Article in Cephalalgia : an international journal of headache, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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, 2 syntheses or guidelines pooled it.

  1. Pooled it
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  4. Observational
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  16. Migraine and triggers: post hoc ergo propter hoc?Current pain and headache reports · 2013
    Review
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

3 authors.

Markus SchürksDivision of Preventive Medicine, Brigham and Women's Hospital, 900 Commonwealth Avenue East, Boston, MA 02215-1204, USA. mschuerks@rics.bwh.harvard.edu
Julie E Buring
Tobias Kurth

Funding

Women's Health Study: Continued Follow-upR01CA047988 · NCI · BRIGHAM AND WOMEN'S HOSPITAL · PI BURING, JULIE E., LEE, I-MIN · 1991 to 2014
$28.2M
TRIAL OF VITAMIN E, BETA-CAROTENE &ASPRIN IN WOMENR01HL043851 · NHLBI · BRIGHAM AND WOMEN'S HOSPITAL · PI BURING, JULIE E · 1991 to 2000
$1.6M
LOW DOSE ASPIRIN IN THE PROPHYLAXIS OF MIGRAINE HEADACHER01NS034108 · NINDS · BRIGHAM AND WOMEN'S HOSPITAL · PI BURING, JULIE E · 1995 to 1996
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NCI NIH HHS CA-47988NCI NIH HHS R01 CA047988NHLBI NIH HHS R01 HL043851NINDS NIH HHS NS-34108
6 · The paper itself

Abstract

aimsMigraine has a wide clinical spectrum. Our aim was to group information on migraine characteristics into meaningful components and to identify key components of the migraine phenotype.

methodsWe performed two principal component analyses, one among participants in the Women's Health Study enrollment cohort and one in a sub-cohort with additional migraine-specific information.

resultsAmong the 9427 women with migraine attack-related information at enrollment, the three most important components pertained to central nervous system (CNS) sensitization, attack frequency/pain location and aura/visual phenomena. In the subgroup of 1675 women with more detailed information, food triggers and unspecific symptoms constituted two principal components that explain more of the variance of the migraine phenotype than the three attack-related components.

conclusionsOur results indicate that information on migraine-associated features, symptoms and triggers is highly correlated, allowing the extraction of principal components. Migraine attack-related symptoms are best summarized by symptoms related to CNS sensitization, attack frequency/pain location and aura/visual phenomena. Taking a more general view, unspecific symptoms and food triggers appear to carry stronger importance in characterizing the migraine phenotype. These components are useful for future research on the pathophysiology and genetics of migraine and may have implications for diagnosing and treating patients.

Indexed as

Principal Component AnalysisFemaleHumansMigraine DisordersPhenotypeRandomized Controlled Trials as TopicWomen

Identifiers

PMID21398421
PMCPMC3100409

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Registered trials

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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.