Evidence map›Paper›PMID 29927953›Full record

ArticlePloS one2018

The relationship between anxiety and acute mountain sickness.

Christopher J Boos, Malcolm Bass, John P O'Hara, Emma Vincent, Adrian Mellor, Luke Sevier, Humayra Abdul-Razakq, Mark Cooke, Matt Barlow, David R Woods

Abstract read
In one paragraph

Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 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

31 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  4. Review
  5. Article
  6. CO and NPflugers Archiv : European journal of physiology · 2026
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  15. Acute Mountain Sickness and the Risk of Subsequent Psychiatric Disorders-A Nationwide Cohort Study in Taiwan.International journal of environmental research and public health · 2023
    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

10 authors.

Christopher J BoosDepartment of Cardiology, Poole Hospital NHS Foundation trust, Poole, United Kingdom.ORCID 0000-0002-3381-5068
Malcolm BassConsultant Clinical Psychologist, Tees Esk and Wear Valleys NHS Trust, Middlesbrough, United Kingdom.
John P O'HaraResearch Institute, for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, United Kingdom.
Emma VincentDefence Medical Services, Lichfield, United Kingdom.
Adrian MellorResearch Institute, for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, United Kingdom.
Luke SevierDepartment of Cardiology, Poole Hospital NHS Foundation trust, Poole, United Kingdom.
Humayra Abdul-RazakqDepartment of Cardiology, Poole Hospital NHS Foundation trust, Poole, United Kingdom.
Mark CookeResearch Institute, for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, United Kingdom.
Matt BarlowResearch Institute, for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, United Kingdom.
David R WoodsResearch Institute, for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, United Kingdom.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionWhilst the link between physical factors and risk of high altitude (HA)-related illness and acute mountain sickness (AMS) have been extensively explored, the influence of psychological factors has been less well examined. In this study we aimed to investigate the relationship between 'anxiety and AMS risk during a progressive ascent to very HA.

methodsEighty health adults were assessed at baseline (848m) and over 9 consecutive altitudes during a progressive trek to 5140m. HA-related symptoms (Lake Louise [LLS] and AMS-C Scores) and state anxiety (State-Trait-Anxiety-Score [STAI Y-1]) were examined at each altitude with trait anxiety (STAI Y-2) at baseline.

resultsThe average age was 32.1 ± 8.3 years (67.5% men). STAI Y-1 scores fell from 848m to 3619m, before increasing to above baseline scores (848m) at ≥4072m (p = 0.01). STAI Y-1 scores correlated with LLS (r = 0.31; 0.24-0.3; P<0.0001) and AMS-C Scores (r = 0.29; 0.22-0.35; P<0.0001). There was significant main effect for sex (higher STAI Y-1 scores in women) and altitude with no sex-x-altitude interaction on STAI Y-1 Scores. Independent predictors of significant state anxiety included female sex, lower age, higher heart rate and increasing LLS and AMS-C scores (p<0.0001). A total of 38/80 subjects (47.5%) developed AMS which was mild in 20 (25%) and severe in 18 (22.5%). Baseline STAI Y-2 scores were an independent predictor of future severe AMS (B = 1.13; 1.009-1.28; p = 0.04; r2 = 0.23) and STAI Y-1 scores at HA independently predicted AMS and its severity.

conclusionTrait anxiety at low altitude was an independent predictor of future severe AMS development at HA. State anxiety at HA was independently associated with AMS and its severity.

Indexed as

Altitude SicknessAnxietySex CharacteristicsAdultAge FactorsAltitudeFemaleHumansMaleMiddle AgedRisk Factors

Identifiers

PMID29927953
PMCPMC6013200

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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.