ArticleTuberculosis and respiratory diseases2026
Clinical Characteristics of Individuals with Chronic Obstructive Pulmonary Disease (COPD), Pre-COPD, Smokers with Normal Lung Function in Korea: Updated Analysis of the Korea COPD Subgroup Study Cohort.
Article in Tuberculosis and respiratory diseases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Prognostic value of distance-saturation product in COPD: Korean nationwide cohort study.ERJ open research · 2026Article
- Cardiovascular components of the COTE index predict acute exacerbations and healthcare costs in patients with chronic obstructive pulmonary disease: a nationwide linked cohort study.Respiratory research · 2026Article
- Small Airway Disease in Pre-COPD and Early COPD: Insights Into the Pulmonary "Silent Zone".International journal of chronic obstructive pulmonary disease · 2026Review
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10 authors.
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Abstract
backgroundChronic obstructive pulmonary disease (COPD) is a heterogeneous lung disease characterized by persistent airflow limitation and is a leading cause of mortality worldwide. Pre-COPD refers to a pre-disease state associated with an increased risk of COPD development. This study aims to evaluate the clinical characteristics of individuals with COPD, pre-COPD, and smokers with normal lung function in South Korea, and to provide an updated analysis of the Korea COPD subgroup study (KOCOSS) cohort data.
methodsWe analyzed data from 4,502 participants in the KOCOSS database collected between 2012 and 2025, including 4,197 with COPD, 126 with pre-COPD, and 179 smokers with normal lung function. Baseline characteristics were compared across these groups.
resultsPatients with COPD were more likely to be male, older, and had a lower body mass index than those with pre-COPD and smokers with normal lung function. Symptom burden, as assessed by the COPD Assessment Test and modified Medical Research Council dyspnea scale, was highest in patients with COPD, followed by pre- COPD and smokers with normal lung function. Patients with COPD had the highest overall use of respiratory medications (89.3%), including inhalers and other treatments, followed by pre-COPD individuals (61.5%) and smokers with normal lung function (47.4%). Hypertension was the most common comorbidity across all groups, with no significant differences in the prevalence of comorbidities.
conclusionThis analysis of the KOCOSS cohort highlights the distinct clinical characteristics of individuals with COPD, pre-COPD, and smokers with normal lung function. Notably, individuals without spirometric COPD still showed substantial symptom burden and inhaler use.
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