Evidence map›Paper›PMID 31229002›Full record

ArticleThe Lancet. Planetary health2019

Associations between daily air quality and hospitalisations for acute exacerbation of chronic obstructive pulmonary disease in Beijing, 2013-17: an ecological analysis.

Lirong Liang, Yutong Cai, Benjamin Barratt, Baolei Lyu, Queenie Chan, Anna L Hansell, Wuxiang Xie, Di Zhang, Frank J Kelly, Zhaohui Tong

Open access · goldAbstract read
In one paragraph

Article in The Lancet. Planetary health, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 1 pooled it
10.0field-weighted citation impact, top 1% of its field
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

68 citing papers in PubMed, 1 synthesis or guideline pooled it, 151 citations in OpenAlex.

  1. A Systematic Review and Meta-Analysis of Short-Term Ambient Ozone Exposure and COPD Hospitalizations.International journal of environmental research and public health · 2020
    Pooled it
  2. Trial
  3. Trial
  4. Review
  5. Article
  6. Quantifying the Health Benefits Linked to Reduced Traffic-Related PMEnvironment & health (Washington, D.C.) · 2026
    Article
  7. Article
  8. Air pollution-induced airway epithelial barrier dysfunction in COPD: a narrative review of mechanisms and therapeutic implications.European respiratory review : an official journal of the European Respiratory Society · 2026
    Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. COPD Exacerbations, Air Pollutant Fluctuations, and Individual-Level Factors in the Pandemic Era.International journal of chronic obstructive pulmonary disease · 2025
    Article
  18. Article
  19. Sociodemographic Determinants of Extreme Heat and Ozone Risk Among Older Adults in 3 Sun Belt Cities.The journals of gerontology. Series A, Biological sciences and medical sciences · 2024
    Article
  20. Article

8 more citing papers are in PubMed but not listed here.

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 at 6 institutions in 2 countries.

Lirong LiangClinical Epidemiology and Tobacco Dependence Treatment Research Department, Beijing Institute of Respiratory Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.
Yutong CaiMRC-PHE Centre for Environment and Health, Department of Analytical, Environmental and Forensic Sciences, School of Population Health and Environmental Sciences, King's College London, London, UK; Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK.
Benjamin BarrattMRC-PHE Centre for Environment and Health, Department of Analytical, Environmental and Forensic Sciences, School of Population Health and Environmental Sciences, King's College London, London, UK.
Baolei LyuHuayun Sounding (Beijing) Meteorological Technology Co, Beijing, China.
Queenie ChanMRC-PHE Centre for Environment and Health, Department of Analytical, Environmental and Forensic Sciences, School of Population Health and Environmental Sciences, King's College London, London, UK; Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK.
Anna L HansellCentre for Environmental Health and Sustainability, University of Leicester, Leicester, UK.
Wuxiang XieDepartment of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK; Peking University Clinical Research Institute, Peking University Health Science Centre, Beijing, China.
Di ZhangClinical Epidemiology and Tobacco Dependence Treatment Research Department, Beijing Institute of Respiratory Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.
Frank J KellyMRC-PHE Centre for Environment and Health, Department of Analytical, Environmental and Forensic Sciences, School of Population Health and Environmental Sciences, King's College London, London, UK.
Zhaohui TongDepartment of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China. Electronic address: tongzhaohuicy@sina.com.
King's College London · GBBeijing Chao-Yang Hospital · CNImperial College London · GBBeijing Meteorological Bureau · CNCapital Medical University · CNUniversity of Leicester · GB

Funding

Medical Research Council MR/L01341X/1Medical Research Council MR/L019744/1Medical Research Council MR/S020810/1
6 · The paper itself

Abstract

backgroundAir pollution in Beijing has been improving through implementation of the Air Pollution Prevention and Control Action Plan (2013-17), but its implications for respiratory morbidity have not been directly investigated. We aimed to assess the potential effects of air-quality improvements on respiratory health by investigating the number of cases of acute exacerbations of chronic obstructive pulmonary disease (COPD) advanced by air pollution each year.

methodsDaily city-wide concentrations of PM

findingsFrom Jan 18, 2013, to Dec 31, 2017, 161 613 hospitalisations for acute exacerbation of COPD were recorded. Mean ambient concentrations of SO

interpretationDespite improvement in overall air quality, increased acute air pollution episodes were significantly associated with increased hospitalisations for acute exacerbations of COPD in Beijing. Stringent air pollution control policies are important and effective for reducing COPD morbidity, and long-term multidimensional policies to safeguard public health are indicated.

fundingUK Medical Research Council.

Indexed as

AdultAgedAged, 80 and overAir PollutantsAir PollutionBeijingEnvironmental ExposureEnvironmental MonitoringFemaleHospitalizationHumansMaleMiddle AgedPulmonary Disease, Chronic ObstructiveSeasonsYoung AdultAir Pollutants

Identifiers

PMID31229002
PMCPMC6610933
OpenAlexW2949501269

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.