Ning Wang1 ; Shu Cong1 ; Jing Fan1 ; Heling Bao1 ; Baohua Wang1（王宝华）;
Linhong Wang1（王临虹） ; Liwen Fang1,#
Introduction: Chronic obstructive pulmonary disease (COPD) has become a major public health problem in China. However, prevalence of COPD by demographics in different regions has not been estimated. This analysis aims to compare the prevalence of COPD by age and sex and the prevalence of disease severity by Global Initiative for Chronic Obstructive Lung Disease (GOLD) stages in the East, Central, and West of China.
Methods: Data from a nationwide surveillance in China between 2014 and 2015 were used, which recruited 66,752 adults aged 40 years or over. All participants underwent pre- and post-bronchodilator pulmonary function tests. COPD and the severity of disease were defined based on the 2018 GOLD lung function criteria.
Results: The prevalence of COPD was 13.7%, 10.9%, and 16.9% in the East, Central, and West, respectively. In all age and gender groups, the prevalence was highest in the West, followed by the East, with the lowest prevalence in Central. The prevalence of mild disease (GOLD stage I), moderate disease (GOLD stage II), severe disease (GOLD stage III), and very severe disease (GOLD stage IV) was also the highest in the West. The prevalence of COPD in each region increased significantly with age and was consistently higher in men than in women.Conclusions and Implications for Public Health Practice: With the support of Healthy China 2030, the government should widely publicize the risk factors and early symptoms of COPD to promote the prevention on COPD and the awareness of early detection among population. The capacity of diagnosis and treatment of COPD among primary healthcare institutions and healthcare workers should be strengthened, particularly in the West, where the prevalence of COPD is comparatively high and health resources are relatively scarce.