Objective To explore the prevalence and risk factors of chronic obstructive pulmonary disease (COPD) among permanent residents aged 40 years and over in Sichuan province and to provide evidences for COPD prevention and control.
Methods Using stratified multistage cluster sampling, we recruited 3 601 permanent residents aged ≥ 40 years in urban communities or rural villages in two districts and 4 counties covered by a national disease surveillance program in Sichuan province. Household questionnaire interview, physical examination and lung function test were carried out among the participants from December 2014 to December 2015.
Results Among 3 391 participants with complete information, 813 were diagnosed as COPD and the COPD prevalence was 24.0%. The results of multi-level variance component model analysis revealed that being male, aged ≥ 50 years, living in rural region, being an ex-smoker, occasionally smoking, daily smoking, and underweight were risk factors of COPD; while, with the education of senior high school and above and exposed to second-hand smoke were protective factors against COPD.
Conclusion The prevalence of COPD was high and mainly influenced by gender, age, education level, residence, smoking status, second-hand smoke exposure and body weight among middle aged and elderly permanent residents in Sichuan province.
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