ArticleERJ open research2022
Expiratory flow limitation in a cohort of highly symptomatic COPD patients.
Article in ERJ open research, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis 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
7 citing papers in PubMed, 1 synthesis or guideline pooled it, 9 citations in OpenAlex.
- GOLD Science Committee recommendations for the use of pre- and post-bronchodilator spirometry for the diagnosis of COPD.The European respiratory journal · 2025Guideline
- Prolonged expiratory time constant and risk of moderate-to-severe exacerbations in stable COPD.Scientific reports · 2026Article
- Small airway dysfunction: a shared, early, measurable, and potentially treatable trait across COPD, asthma, and fibrotic lung disease.Frontiers in medicine · 2026Review
- Peripheral airway function and disease burden in COPD.ERJ open research · 2025Article
- Expiratory flow limitation development index (ELDI): a novel method of assessing respiratory mechanics in COPD.Respiratory research · 2024Article
- Oscillometry-Defined Small Airway Dysfunction in Patients with Chronic Obstructive Pulmonary Disease.Tuberculosis and respiratory diseases · 2024Article
- Investigation of the Methodology of Specific Airway Resistance Measurements in COPD.International journal of chronic obstructive pulmonary disease · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The question addressed by the study: Small airway collapse during expiration, known as expiratory flow limitation (EFL), can be detected using oscillometry and is associated with worse clinical outcomes in COPD. This study investigated the prevalence of EFL in a cohort of highly symptomatic patients, evaluated clinical and lung function characteristics of patients with EFL and studied the repeatability of EFL over 6 months. Materials/patients and methods: 70 patients were recruited. Clinical characteristics and lung function metrics were collected at baseline and 6 months. Impulse oscillometry was used to detect the presence of EFL. Patients were defined as EFL Results: EFL Answer to the question: Overall, these data indicate that EFL
Identifiers
What OpenQuestion holds
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.