SynthesisSports medicine (Auckland, N.Z.)2020
Asthma in Competitive Cross-Country Skiers: A Systematic Review and Meta-analysis.
Synthesis in Sports medicine (Auckland, N.Z.), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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.
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.
Who cites it
12 citing papers in PubMed, 27 citations in OpenAlex.
- Relationship between prevalence and severity of exercise-induced pulmonary hemorrhage and environmental factors.Journal of veterinary internal medicine · 2026Article
- Snow sports-specific extension of the IOC consensus statement: methods for recording and reporting epidemiological data on injury and illness in sports.British journal of sports medicine · 2024Article
- Article
- Acute respiratory infections hamper training and competition in cross-country skiers, especially in those with asthma.International journal of circumpolar health · 2023Article
- Elite skiers' experiences of heat- and moisture-exchanging devices and training and competition in the cold: A qualitative survey.Health science reports · 2023Article
- The oxygen transport cascade and exercise: Lessons from comparative physiology.Comparative biochemistry and physiology. Part A, Molecular & integrative physiology · 2023Article
- Cross-country skiers often experience respiratory symptoms during and after exercise but have a low prevalence of prolonged cough.BMJ open sport & exercise medicine · 2023Article
- A breathing mask attenuates acute airway responses to exercise in sub-zero environment in healthy subjects.European journal of applied physiology · 2022Article
- Overuse of Short-Acting Beta-2 Agonists (SABAs) in Elite Athletes: Hypotheses to Explain It.Sports (Basel, Switzerland) · 2022Review
- Prevalence of Asthma among Norwegian Elite Athletes.Translational sports medicine · 2022Article
- Asthma in elite athletes - do they have Type 2 or non-Type 2 disease? A new insight on the endotypes among elite athletes.Frontiers in allergy · 2022Review
- High training volume is associated with increased prevalence of non-allergic asthma in competitive cross-country skiers.BMJ open sport & exercise medicine · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionIn cross-country skiing, the repetitive ventilation of large amounts of cold and dry air strains the airways. The aim of this systematic review was to establish an overview of the current literature on asthma in cross-country skiers, biathletes and ski-orienteers.
methodsSix databases were searched on August 29, 2019. The search yielded 2161 articles. Thirty articles fulfilled the search criteria and were pooled together for a qualitative synthesis. Eight articles were included in the meta-analysis on the prevalence of asthma and the use of asthma medication.
resultsAccording to the meta-analysis, the prevalence of self-reported physician-diagnosed asthma in skiers was 21% (95% CI 14-28%). The onset age of asthma was higher in skiers than in non-skiers with asthma. The prevalence of asthma medication use was on average 23% (CI 95% 19-26%). Several studies reported that asthma was underdiagnosed in skiers, as previously healthy skiers without a prior asthma diagnosis or medication use were frequently found to fulfill diagnostic criteria for asthma according to lung function tests. Studies using bronchial biopsy demonstrated that eosinophilic asthma is not detected in skiers with asthma as often as it is in non-skiers with asthma and that there are signs of airway inflammation even in non-asthmatic skiers.
conclusionOur findings suggest that the accuracy and coverage of diagnosing asthma in skiers has improved over the recent decades. However, the optimal treatment and natural course of asthma in this population remain unclear. Future research should investigate how the intensity of training, airway infections and their treatment affect the development of asthma among skiers. PRD REGISTRATION NUMBER: CRD42017070940.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.