ArticleInternational journal of chronic obstructive pulmonary disease2019
CAT Score and SGRQ Definitions of Chronic Bronchitis as an Alternative to the Classical Definition.
Article in International journal of chronic obstructive pulmonary disease, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 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
17 citing papers in PubMed, 2 syntheses or guidelines pooled it, 30 citations in OpenAlex.
- Evidence Construction of Chuankezhi Injection Against Chronic Obstructive Pulmonary Disease: A Systematic Review and Network Pharmacology.International journal of chronic obstructive pulmonary disease · 2024Pooled it
- Effect of SGRQ-Defined Chronic Bronchitis at Baseline on Treatment Outcomes in Patients with COPD Receiving Nebulized Glycopyrrolate.International journal of chronic obstructive pulmonary diseasePooled it
- Bronchodilators in Tobacco-Exposed Persons with Symptoms and Preserved Lung Function.The New England journal of medicine · 2022Trial
- Toward precision medicine in COPD: phenotypes, endotypes, biomarkers, and treatable traits.Respiratory research · 2025Review
- Impact of bronchitis variability on outcomes of COPD.BMJ open respiratory research · 2025Observational
- Disease Onset and Burden in Patients With Chronic Bronchitis and COPD: A Real-World Evidence Study.Chronic obstructive pulmonary diseases (Miami, Fla.) · 2025Article
- Interventional pulmonology for chronic inflammatory airway diseases.Chinese medical journal pulmonary and critical care medicine · 2024Review
- Clinical significance of chronic bronchitis in different racial groups.BMC pulmonary medicine · 2024Article
- Associations of Vitamin D With GPX4 and Iron Parameters in Chronic Obstructive Pulmonary Disease Patients: A Case-Control Study.Canadian respiratory journal · 2024Article
- Reply to GanAmerican journal of respiratory and critical care medicine · 2023Article
- Patients' acceptance of outcome and experience measurements during hospitalisation for COPD exacerbations: a CICERO Clinical Research Collaboration-European Lung Foundation online patient survey.ERJ open research · 2023Article
- Blood Adipokines/Cytokines in Young People with Chronic Bronchitis and Abdominal Obesity.Biomolecules · 2022Article
- Home based pulmonary tele-rehabilitation under telemedicine system for COPD: a cohort study.BMC pulmonary medicine · 2022Article
- Association of body mass index and COPD exacerbation among patients with chronic bronchitis.Respiratory research · 2022Observational
- Comparison of clinical characteristics between chronic bronchitis and non-chronic bronchitis in patients with chronic obstructive pulmonary disease.BMC pulmonary medicine · 2022Article
- Article
- Diagnosis and Treatment of Early Chronic Obstructive Lung Disease (COPD).Journal of clinical medicine · 2020Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
10 authors at 8 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Purpose: Previous studies have used various definitions to classify chronic obstructive pulmonary disease (COPD) patients into chronic bronchitis (CB) and non-CB patients. This study was performed to identify differences among three definitions of CB based on the classical method, St. George's Respiratory Questionnaire (SGRQ), and the CAT (COPD Assessment Test) score. Patients and methods: We extracted data from the multicenter Korea COPD Subgroup Study (KOCOSS) cohort, for which patients recruited from among 47 medical centers in South Korea beginning in April 2012. Patients were classified according to three different definitions of CB: 1) classical definition; 2) SGRQ (using questions regarding cough and sputum); and 3) CAT score (comprising cough [CAT1] and sputum [CAT2] subscale scores). Results: A total of 2694 patients were enrolled in this study. The proportions of CB were 10.8%, 35.8%, and 24.0% according to the classical, SGRQ, and CAT definitions, respectively. The three definitions yielded consistently significant differences between CB and non-CB patients in modified Medical Research Council dyspnea scale CAT score, SGRQ score, number of moderate-to-severe exacerbations per year and forced expiratory volume in 1 second. By three definitions, CB consistently predicted future risk of exacerbation. The kappa coefficient of agreement between the classical definition and SGRQ definition was 0.29, that of the classical definition and CAT definition was 0.32, and that of the SGRQ definition and CAT definition was 0.44. Conclusion: Patients with CB according to the new definitions based on SGRQ or CAT score showed similar clinical characteristics to those defined according to the classical definition. The new CB definitions may be used as alternatives to the classical definition.
Indexed as
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.