Evidence map›Paper›PMID 33344472›Full record

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.

Yanfei Guo, Zhenzhen Xing, Guangliang Shan, Jean-Paul Janssens, Tieying Sun, Di Chai, Weiming Liu, Yuxia Wang, Yali Ma, Yaqi Tong and 3 more

Abstract read
In one paragraph

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.

0numbers the graph read from it
0cells of the map it votes in
30citing 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

30 citing papers in PubMed.

  1. Trial
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  8. Adjustment Criteria for Air-Quality Standards by Altitude: A Scoping Review with Regulatory Overview.International journal of environmental research and public health · 2025
    Article
  9. Article
  10. A Brief and Effective Questionnaire for COPD Screening in High-Altitude Areas.International journal of chronic obstructive pulmonary disease · 2025
    Article
  11. Article
  12. Article
  13. Article
  14. 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 · 2024
    Article
  15. 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

13 authors.

Yanfei GuoNational Clinical Research Center for Respiratory Diseases, Beijing, China.
Zhenzhen XingDepartment of Respiratory and Critical Care Medicine, Beijing Hospital, Beijing, China.
Guangliang ShanSchool of Basic Medicine, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China.
Jean-Paul JanssensDivision of Pulmonary Diseases, Department of Medicine, Geneva University Hospitals, Geneva, Switzerland.
Tieying SunNational Clinical Research Center for Respiratory Diseases, Beijing, China.
Di ChaiDepartment of Respiratory and Critical Care Medicine, Beijing Hospital, Beijing, China.
Weiming LiuDepartment of Intensive Care Medicine, Beijing Boai Hospital, Beijing, China.
Yuxia WangDepartment of Respiratory and Critical Care Medicine, Beijing Hospital, Beijing, China.
Yali MaDepartment of Respiratory and Critical Care Medicine, Beijing Hospital, Beijing, China.
Yaqi TongDepartment of Respiratory and Critical Care Medicine, Beijing Hospital, Beijing, China.
Yilin HuangDepartment of Respiratory and Critical Care Medicine, Beijing Hospital, Beijing, China.
Yang CaoDepartment of Respiratory and Critical Care Medicine, Beijing Hospital, Beijing, China.
Chen WangNational Clinical Research Center for Respiratory Diseases, Beijing, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

PubMed holds no abstract for this paper.

Indexed as

Chronic Obstructive Pulmonary Disease (COPD)high altitudehousehold air pollutionprevalencerisk factorstuberculosis

Identifiers

PMID33344472
PMCPMC7744817

What OpenQuestion holds

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Registered trials

None linked

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.