Prevalence and incidence of COPD in Korean Community-Based Cohort = Prevalence and incidence of COPD in Korean Community-Based Cohort

다국어 초록 (Multilingual Abstract)

Background: COPD is a leading cause of chronic morbidity and mortality. We analyzed prevalence and incidence rate of COPD using community based cohort database. Methods: Ansung-Ansan cohort is a community-based cohort of 10,038 participants aged 40-69yr. Initial enrollment was carried out in 2001 and follow-up examinations are conducted biennially. The data from a baseline survey and two subsequent surveys were analyzed. COPD was defined as a forced expiratory volume in 1s(FEV1)/forced vital capacity(FVC) ratio<0.7. We calculated the prevalence and incidence rate of COPD from 2001 to 2005. And we analyzed the factors associated with prevalence and incidence of COPD. Results: The prevalence of COPD was increased from 8.8%(2001) to 13.3%(2005). In terms of severity of airway obstruction, the prevalence of mild COPD has increased most among COPD group. The changes of prevalence were prominent in men, older age group(>70 years), smokers, and low income earners. The overall crude incidence rate of COPD per 100,000 person-year was 1447.8 and standardized incidence rate corrected by standard Korean population was 1513.1. The incidence rate of COPD was higher in men than in women and increased with increasing age. Smoking more than 20 pack-years and low income were also associated with the incidence rate of COPD. Conclusions: We demonstrated the prevalence and incidence rate of COPD in Korean adult population with community based cohort database. The incidence rate was increased with increasing age, smoking amount and higher in men. But it was low in low income population.