Evidence map›Paper›PMID 28556384›Full record

ArticleEuropean journal of neurology2017

Migraine associated with altitude: results from a population-based study in Nepal.

M Linde, L Edvinsson, K Manandhar, A Risal, T J Steiner

Abstract read
In one paragraph

Article in European journal of neurology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–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

21 citing papers in PubMed.

  1. Article
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  5. [Temporal trend of the global prevalence rate of tension-type headache in children and adolescents in 1990-2021].Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics · 2024
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  14. Recommendations for traveling to altitude with neurological disorders.Journal of central nervous system disease · 2021
    Review
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  16. Article
  17. Article
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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

5 authors.

M LindeDepartment of Neuromedicine and Movement Science, NTNU Norwegian University of Science and Technology, Trondheim, Norway.ORCID 0000-0002-6026-3596
L EdvinssonInstitute of Clinical Sciences, Lund University, Lund, Sweden.
K ManandharDepartment of Neuromedicine and Movement Science, NTNU Norwegian University of Science and Technology, Trondheim, Norway.
A RisalDepartment of Neuromedicine and Movement Science, NTNU Norwegian University of Science and Technology, Trondheim, Norway.
T J SteinerDepartment of Neuromedicine and Movement Science, NTNU Norwegian University of Science and Technology, Trondheim, Norway.ORCID 0000-0002-1882-4337

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeA 1988 pilot study in Peru suggested an association between migraine and chronic exposure to high altitude. This study provides epidemiological evidence corroborating this.

methodsIn a cross-sectional nationwide population-based study, a representative sample of Nepali-speaking adults were recruited through stratified multistage cluster sampling. They were visited at home by trained interviewers using a culturally adapted questionnaire. The altitude of dwelling of each participant was recorded.

resultsOf 2100 participants, over half [1100 (52.4%)] were resident above 1000 m and almost one quarter [470 (22.4%)] at ≥2000 m. Age- and gender-standardized migraine prevalence increased from 27.9% to 45.5% with altitude between 0 and 2499 m and thereafter decreased to 37.9% at ≥2500 m. The likelihood of having migraine was greater (odds ratio, 1.5-2.2; P ≤ 0.007) at all higher altitudes compared with <500 m. In addition, all symptom indices increased with altitude across the range <500 m to 2000-2499 m, i.e. median attack frequency from 1.3 to 3.0 days/month (P < 0.001), median duration from 9 to 24 h (P < 0.001) and pain intensity [the proportion reporting 'bad pain' (highest intensity)] from 35.5% to 56.9% (P = 0.011). Each of these showed a downward trend above 2500 m.

conclusionsDwelling at high altitudes increases not only migraine prevalence but also the severity of its symptoms.

Indexed as

AltitudeAdolescentAdultAgedCross-Sectional StudiesFemaleHumansMaleMiddle AgedMigraine DisordersNepalPilot ProjectsPrevalenceSurveys and QuestionnairesYoung AdultaltitudeepidemiologyGlobal Campaign against Headacheheadachehypoxiamigraineprevalencerisk factors

Identifiers

PMID28556384
PMCPMC5518276

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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.