Evidence map›Paper›PMID 24603814›Full record

ArticleThe European respiratory journal2014

Prevalence and correlates of airflow obstruction in ∼317,000 never-smokers in China.

Margaret Smith, Liming Li, Mareli Augustyn, Om Kurmi, Junshi Chen, Rory Collins, Yu Guo, Yabin Han, Jingxin Qin, Guanqun Xu and 6 more

Open access · bronzeAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in The European respiratory journal, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 4 pooled it
6.8field-weighted citation impact, top 3% 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

37 citing papers in PubMed, 4 syntheses or guidelines pooled it, 73 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Fibrotic interstitial lung diseases and air pollution: a systematic literature review.European respiratory review : an official journal of the European Respiratory Society · 2020
    Pooled it
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  7. Review
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  11. Advances in the awareness of tuberculosis-associated chronic obstructive pulmonary disease.Chinese medical journal pulmonary and critical care medicine · 2024
    Review
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  13. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

16 authors at 8 institutions in 3 countries.

Margaret SmithClinical Trial Service Unit and Epidemiological Studies Unit (CTSU), University of Oxford, Oxford, UK Margaret.smith@ctsu.ox.ac.uk.
Liming LiChinese Academy of Medical Sciences, Beijing School of Public Health, Peking University Health Sciences Center, Beijing.
Mareli AugustynClinical Trial Service Unit and Epidemiological Studies Unit (CTSU), University of Oxford, Oxford, UK.
Om KurmiClinical Trial Service Unit and Epidemiological Studies Unit (CTSU), University of Oxford, Oxford, UK.
Junshi ChenChina National Center for Food Safety Risk Assessment, Beijing.
Rory CollinsClinical Trial Service Unit and Epidemiological Studies Unit (CTSU), University of Oxford, Oxford, UK.
Yu GuoChinese Academy of Medical Sciences, Beijing.
Yabin HanTongxiang Center for Disease Control, Tongxiang.
Jingxin QinLiuzhou Center for Disease Control, Liuzhou.
Guanqun XuSuzhou Center for Disease Control, Suzhou.
Jian WangPengzhou Center for Disease Control, Pengzhou.
Zheng BianChinese Academy of Medical Sciences, Beijing.
Gang ZhouHenan Center for Disease Control, Zhengzhou, China.
Richard PetoClinical Trial Service Unit and Epidemiological Studies Unit (CTSU), University of Oxford, Oxford, UK.
Zhengming ChenClinical Trial Service Unit and Epidemiological Studies Unit (CTSU), University of Oxford, Oxford, UK.
China Kadoorie Biobank collaborative group
University of Oxford · GBCenter for Disease Control · TWAcademia Sinica · TWAcademy of Medical Sciences · GBChina National Center for Food Safety Risk Assessment · CNHenan Provincial Center for Disease Control and Prevention · CNPeking University · CNXian Center for Disease Control and Prevention · CN

Funding

Medical Research Council MC_U137686851Wellcome Trust
6 · The paper itself

Abstract

In China, the burden of chronic obstructive disease (COPD) is high in never-smokers but little is known about its causes in this group. We analysed data on 287 000 female and 30 000 male never-smokers aged 30-79 years from 10 regions in China, who participated in the China Kadoorie Biobank baseline survey (2004-2008). Prevalence of airflow obstruction (AFO) (pre-bronchodilator forced expiratory volume in 1 s (FEV1)/forced vital capacity (FVC) <0.7 and below the lower limit of normal (LLN)) was estimated, by age and region. Cross-sectional associations of AFO (FEV1/FVC <0.7), adjusted for confounding, were examined. AFO prevalence defined as FEV1/FVC <0.7 was 4.0% in females and 5.1% in males (mean ages 51 and 54 years, respectively). AFO prevalence defined as FEV1/FVC <LLN was 5.9% and 5.2%, respectively. In females, odds ratios of AFO were positively associated with lower household income (1.63, 95% CI 1.55-1.72 for lowest versus highest income groups), prior tuberculosis (2.36, 95% CI 2.06-2.71), less education (1.17, 95% CI 1.12-1.23 for no schooling versus college education), rural region and lower body mass index. AFO was positively associated with cooking with coal but not with other sources of household air pollution. Associations were similar for males. AFO is prevalent in Chinese never-smokers, particularly among those with low socioeconomic status or prior tuberculosis, and in rural males.

Indexed as

AdultAgedAir Pollution, IndoorAsthmaBody Mass IndexChinaCookingCross-Sectional StudiesFemaleForced Expiratory VolumeHumansMaleMiddle AgedOdds RatioPrevalencePulmonary Disease, Chronic Obstructive

Identifiers

PMID24603814
PMCPMC4076527
OpenAlexW2166066743

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.