Evidence map›Paper›PMID 39478509›Full record

SynthesisBMC public health2024

Prevalence of non-smoking chronic obstructive pulmonary disease and its risk factors in China: a systematic review and meta-analysis.

Yue Zhang, Xiaoyan Gai, Hongling Chu, Jingge Qu, Liang Li, Yongchang Sun

Abstract readSystematic ReviewMeta-Analysis
PubMed Full text at PMC Publisher
In one paragraph

Synthesis in BMC public health, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
–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

12 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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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

6 authors.

Yue ZhangDepartment of Respiratory and Critical Care Medicine, Research Center for Chronic Airway Diseases, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China.
Xiaoyan GaiDepartment of Respiratory and Critical Care Medicine, Research Center for Chronic Airway Diseases, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China.
Hongling ChuResearch Centre of Clinical Epidemiology, Peking University Third Hospital, Beijing, 100191, China.
Jingge QuDepartment of Respiratory and Critical Care Medicine, Research Center for Chronic Airway Diseases, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China.
Liang LiDepartment of Bacteriology and Immunology, Beijing Chest Hospital, Capital Medical University/Beijing Tuberculosis & Thoracic Tumor Research Institute, Beijing, 101149, China.
Yongchang SunDepartment of Respiratory and Critical Care Medicine, Research Center for Chronic Airway Diseases, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China. suny@bjmu.edu.cn.

Funding

National Natural Science Foundation of China 81970041
6 · The paper itself

Abstract

backgroundChronic obstructive pulmonary disease (COPD) is a prevalent chronic disorder in China, impacting a significant proportion of individuals aged > 40 years. In China, the prevalence of and risk factors for COPD among non-smokers remain largely unexplored. In this study, we aimed to determine the prevalence of COPD in non-smokers within the Chinese population and identify potential risk factors associated with COPD in non-smokers.

methodsWeb of Science, PubMed, Embase, Chinese WanFang, Chinese China National Knowledge Infrastructure, and Weipu databases from inception to August 5, 2024, were searched. Studies reporting the percentage of never-smokers among those diagnosed with COPD and investigations exploring the risk factors associated with COPD in never-smokers in China were examined. Summary proportions and odds ratios (OR), along with their corresponding 95% confidence intervals (95% CI), were measured.

resultsIn total, 112 investigations with 491,812 participants were included. The percentage of never-smokers in people with COPD was 41.1% (95% CI: 37.5-44.6%). The prevalence of never-smokers among males diagnosed with COPD was 22.3% (95% CI: 18.8-25.7%), which differed from that among women (81.3%, 95% CI: 75.3-87.2%). The results showed an association between the utilization of biomass fuel and the occurrence of COPD in never-smokers (OR: 1.25, 95% CI: 1.06-1.44). Among never-smokers, the data showed a close association between being underweight (OR: 1.89, 95% CI: 1.78-2.00), tuberculosis history (OR: 1.71, 95% CI: 1.53-1.88) and COPD. Never-smokers living in rural areas or those with low educational status were more susceptible to COPD.

conclusionThis review confirmed the highly different proportions of never-smokers among male and female patients with COPD.

trial registrationPROSPERO: CRD42023420786.

Indexed as

Pulmonary Disease, Chronic ObstructiveChinaFemaleHumansMaleNon-SmokersPrevalenceRisk FactorsChronic obstructive pulmonary diseaseNon-smokerProportionRisk factor

Identifiers

PMID39478509
PMCPMC11526722

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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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.