ArticleThe European respiratory journal2017
Prevalence and burden of chronic bronchitis symptoms: results from the BOLD study.
Article in The European respiratory journal, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06134947 (Assessment of Right Ventricular Function Among Children With Chronic Lung Disease), which is not on this map. Cited by 60 papers, 4 of them syntheses that pooled 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.
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.
Assessment of Right Ventricular Function Among Children With Chronic Lung Disease
Who cites it
60 citing papers in PubMed, 4 syntheses or guidelines pooled it, 101 citations in OpenAlex.
- The association of spirometric small airways obstruction with respiratory symptoms, cardiometabolic diseases, and quality of life: results from the Burden of Obstructive Lung Disease (BOLD) study.Respiratory research · 2023Pooled it
- The prevalence of comorbidity in the lung cancer screening population: A systematic review and meta-analysis.Journal of medical screening · 2023Pooled it
- Educational interventions for health professionals managing chronic obstructive pulmonary disease in primary care.The Cochrane database of systematic reviews · 2022Pooled it
- Association Between Non-obstructive Chronic Bronchitis and Incident Chronic Obstructive Pulmonary Disease and All-Cause Mortality: A Systematic Review and Meta-Analysis.Frontiers in medicine · 2021Pooled it
- Efficacy and Safety of Guben Kechuan Granules in the Treatment of Chronic Bronchitis: A Multi-Center and Randomized Controlled Trial.Drug design, development and therapy · 2025Trial
- Efficacy, Safety, and Pharmacoeconomic Evaluation of Shiwei Longdanhua Capsules in Acute Exacerbation of Chronic Bronchitis with Phlegm-Heat Obstructing Fei (Lung): A Multicenter, Randomized, Double-Blind, Double-Dummy, Active-Control Trial.Chinese journal of integrative medicine · 2026Article
- Periodontal Disease and Incident Chronic Bronchitis: A Nationwide Population-Based Cohort Study.Biomedicines · 2026Article
- Vapors, gases, dusts and fumes at work and chronic obstructive pulmonary disease/bronchitis: a systematic review and meta-analyses.Journal of occupational medicine and toxicology (London, England) · 2026Article
- Susceptible windows of long-term childhood exposure to air pollution on adult self-reported bronchitic symptoms.International journal of epidemiology · 2026Article
- Child maltreatment and substance use: associations with alcohol use, nicotine use, and quality of life in a Norwegian population sample.Frontiers in public health · 2026Article
- Low sRAGE Level is Associated with Increased Future Exacerbation Risk in Mild-to-Moderate COPD and Patients with Chronic Bronchitis Symptoms.International journal of chronic obstructive pulmonary disease · 2026Observational
- Impact of bronchitis variability on outcomes of COPD.BMJ open respiratory research · 2025Observational
- Isolation of phytochemicals and exploration the mechanism of Dolichandrone spathacea in the treatment of chronic bronchitis by integrating network pharmacology, molecular docking, and experimental validation.Botanical studies · 2025Article
- Association between frailty and frailty change with chronic lung disease: results from two prospective cohort studies.BMC public health · 2025Article
- Performance of Computer-Aided Detection Software in Tuberculosis Case Finding in Township Health Centers in China.Chronic diseases and translational medicine · 2025Article
- Machine learning prediction model with shap interpretation for chronic bronchitis risk assessment based on heavy metal exposure: a nationally representative study.BMC pulmonary medicine · 2025Article
- Occupational exposure and chronic bronchitis in a sample of the general population in Telemark, Norway: a two-phased cross-sectional study.Occupational and environmental medicine · 2025Article
- Sex Differences in Chronic Obstructive Pulmonary Disease: Implications for Pathogenesis, Diagnosis, and Treatment.International journal of molecular sciences · 2025Review
- Sex-related association between smoke exposure and gallstones in a US population: a cross-sectional study.BMC public health · 2025Article
- Shashen Maidong Decoction's Effects on Chronic Bronchitis: A Multi-Method Approach.Current pharmaceutical design · 2025Article
Corrections and comments
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Authors and funding
11 authors at 6 institutions in 5 countries.
Funding
Abstract
We studied the prevalence, burden and potential risk factors for chronic bronchitis symptoms in the Burden of Obstructive Lung Disease study.Representative population-based samples of adults aged ≥40 years were selected in participating sites. Participants completed questionnaires and spirometry. Chronic bronchitis symptoms were defined as chronic cough and phlegm on most days for ≥3 months each year for ≥2 years.Data from 24 855 subjects from 33 sites in 29 countries were analysed. There were significant differences in the prevalence of self-reported symptoms meeting our definition of chronic bronchitis across sites, from 10.8% in Lexington (KY, USA), to 0% in Ile-Ife (Nigeria) and Blantyre (Malawi). Older age, less education, current smoking, occupational exposure to fumes, self-reported diagnosis of asthma or lung cancer and family history of chronic lung disease were all associated with increased risk of chronic bronchitis. Chronic bronchitis symptoms were associated with worse lung function, more dyspnoea, increased risk of respiratory exacerbations and reduced quality of life, independent of the presence of other lung diseases.The prevalence of chronic bronchitis symptoms varied widely across the studied sites. Chronic bronchitis symptoms were associated with significant burden both in individuals with chronic airflow obstruction and those with normal lung function.
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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.