ArticleInternational journal of chronic obstructive pulmonary disease2020
FEF
Article in International journal of chronic obstructive pulmonary disease, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 60 papers, 2 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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
60 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Incidence and Risk Factors for Progression from Pre-COPD to COPD: A Systematic Review and Meta‑analysis.International journal of chronic obstructive pulmonary disease · 2026Pooled it
- Spirometry parameters used to define small airways obstruction in population-based studies: systematic review.Respiratory research · 2022Pooled it
- Associations Between Musculoskeletal Structural Parameters and Pulmonary Function in Chronic Obstructive Pulmonary Disease: A Cross-Sectional Study.Medical sciences (Basel, Switzerland) · 2026Article
- Small airways dysfunction: associated factors, clinical aspects and new perspectives.European respiratory review : an official journal of the European Respiratory Society · 2026Review
- Respiratory health impacts of coal-fired power plant emissions with transboundary environmental complexities.Scientific reports · 2026Article
- Therapeutic potential of synergistic mucociliary clearance for cystic fibrosis airways by β-adrenergic plus cholinergic agonists.The Journal of clinical investigation · 2026Article
- Small airways obstruction predicts cardiovascular disease incidence: a longitudinal study of UK Biobank.ERJ open research · 2026Article
- Gestational diabetes and childhood lung function at age 8 to 9 years in a diverse US cohort.Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology · 2026Article
- Pre-COPD: Impact on prevention, detection, and treatment.Presse medicale (Paris, France : 1983) · 2026Review
- Mapping the trajectory from pre-COPD to COPD: predictive value of symptoms, imaging, and physiologic abnormalities.Annals of the American Thoracic Society · 2026Article
- Prevalence and Environmental Correlates of Small Airways Dysfunction in a Rural Swiss Cohort.Respiration; international review of thoracic diseases · 2026Article
- Prevalence of Reduced Mid-Expiratory Flow Among Coal Workers' Health Surveillance Program Participants.American journal of industrial medicine · 2025Article
- Lung function decline and incidence of chronic obstructive pulmonary disease in participants with spirometry-defined small airway dysfunction: a 15-year prospective cohort study in China.Respiratory research · 2025Article
- Ambient exposure to nitrogen dioxide and lung function: a multi-metric approach.Environmental monitoring and assessment · 2025Article
- Optimal spirometry thresholds for the prediction of chronic airflow obstruction: a multinational longitudinal study.ERJ open research · 2025Article
- Septoplasty-mediated improvements in nasal patency and pulmonary function: A prospective study.Laryngoscope investigative otolaryngology · 2025Article
- Assessing the short-term hematological and pulmonary effects of air pollution: a cross-sectional study in a Turkish urban setting.BMC public health · 2025Article
- Exhaled Breath Analysis: From Laboratory Test to Wearable Sensing.IEEE reviews in biomedical engineering · 2025Review
- Prevalence and Risk Factors of Spirometry-Defined Small Airway Dysfunction in the High-Risk Population for COPD in Yunnan Province, China: A Population Based Cross-Sectional Study.International journal of chronic obstructive pulmonary disease · 2025Article
- Risk Factors for Acute Exacerbation in Patients with COPD Group E in Ningbo: Risk Analysis of Irregular Review, Cardiovascular Complications, and Lung Function Decline.International journal of chronic obstructive pulmonary disease · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Purpose: The forced mid-expiratory flow (FEF Patients and Methods: Between July 1, 2007 and June 31, 2009, we identified 3624 patients who underwent a pulmonary function test (PFT) in Gangnam Severance Hospital. We selected 307 patients aged over 40 years without COPD who had normal PFT results at baseline and who had follow-up PFT records more than 1 year later. A FEF Results: Among 307 patients, 91 (29.6%) had low FEF Conclusion: The FEF
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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.