Targeting high-risk populations for chronic obstructive pulmonary disease (COPD), targeted at key issues such as unclear risk factors and lack of prevention and treatment plans, high-risk population screening was conducted to identify risk factors. This study is expected to detect at least 3600 high-risk individuals with early-stage chronic obstructive pulmonary disease. The incidence rate of high-risk individuals in the early stage of chronic obstructive pulmonary disease is 30%, which means the total screening population is 12000 cases.
