ArticleFrontiers in medicine2020
Prevalence and Risk Factors for COPD at High Altitude: A Large Cross-Sectional Survey of Subjects Living Between 2,100-4,700 m Above Sea Level.
Article in Frontiers in medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 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
30 citing papers in PubMed.
- High-flow nasal oxygen versus conventional nasal cannula for gastroscopy with sedation in elderly patients at high altitudes: a partially-blinded randomized controlled trial in Tibet, China.BMC anesthesiology · 2026Trial
- Comparing effects of breathing exercises alone and combined with breathing-stretching exercises on respiratory indices, disease severity and exercise capacity in COPD.Scientific reports · 2025Trial
- Development and validation of nomogram including high altitude as a risk factor for COPD: A cross-sectional study based on Gansu population.Frontiers in public health · 2023Trial
- Friend or foe: Face masks in patients with COPD at high altitude.Physiological reports · 2026Review
- The prevalence of chronic obstructive pulmonary disease in high-altitude areas of China: a systematic review and meta-analysis.Journal of thoracic disease · 2025Article
- Bidirectional Association Between Tuberculosis and Chronic Obstructive Pulmonary Disease: A Systematic Review and Meta-Analysis.Journal of clinical medicine · 2025Review
- Effect of High Altitude on Small Pulmonary Vein and Artery Volume in the COPDGene Cohort: Towards Better Understanding of Lung Physiology and Pulmonary Disease.Journal of personalized medicine · 2025Article
- Adjustment Criteria for Air-Quality Standards by Altitude: A Scoping Review with Regulatory Overview.International journal of environmental research and public health · 2025Article
- Prevalence of chronic obstructive pulmonary disease in high-risk populations at low, intermediate, high altitudes: a population based cross-sectional study in Yunnan Province, China.BMC pulmonary medicine · 2025Article
- A Brief and Effective Questionnaire for COPD Screening in High-Altitude Areas.International journal of chronic obstructive pulmonary disease · 2025Article
- Impact of Low Altitude-Hilly Terrain on Pulmonary Health in Young Adults: A Gender-Based Spirometric Analysis.Journal of pharmacy & bioallied sciences · 2024Article
- The Impact of the Chronic High-Altitude Environment on Chronic Obstructive Pulmonary Disease Outcomes.American journal of respiratory and critical care medicine · 2024Article
- COVID-19 in the Tibet, China, the roof of the world: a comparative analysis of high-altitude residents and newcomers.BMC infectious diseases · 2024Article
- Comparison of physical activity levels in people with chronic obstructive pulmonary disease and healthy subjects residing in hypobaric hypoxia environments.Canadian journal of respiratory therapy : CJRT = Revue canadienne de la therapie respiratoire : RCTR · 2024Article
- Prevalence of Chronic Obstructive Pulmonary Disease and Its Associated Risk Factors in Yunnan Province, China: A Population Based Cross-Sectional Study.International journal of chronic obstructive pulmonary disease · 2024Article
- Prevalence and Associated Factors of Chronic Obstructive Pulmonary Disease Among Adults in Neno District, Malawi: A Cross-Sectional Analytical Study.International journal of chronic obstructive pulmonary disease · 2024Article
- Combined effect of ozone and household air pollution on COPD in people aged less than 50 years old.Thorax · 2023Article
- Comparison of the lower limit of normal to the fixed ratio method for the diagnosis of airflow obstruction at high altitudes: a large cross-sectional survey of subjects living between 3000-4700 m above sea level.European journal of medical research · 2023Article
- Ambient particulate matter associates with asthma in high altitude region: A population-based study.The World Allergy Organization journal · 2023Article
- Airflow obstruction and small airway dysfunction following pulmonary tuberculosis: a cross-sectional survey.Thorax · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
13 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
PubMed holds no abstract for this paper.
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.