Research progress on pre-chronic obstructive pulmonary disease
Chronic obstructive pulmonary disease(COPD)is a disease presenting incompletely reversible and persis-tent airflow obstruction,which needs a long time to be developed.If individuals who would develop COPD finally could be i-dentified before the disease occurs,such as those with respiratory symptoms,structural or functional abnormalities but normal forced expiratory volume in one second(FEV1)/forced vital capacity(FVC)at present(pre-COPD),interventions regard-ing risk factors and treatment in early stage could be implemented to slow down the disease progression.In this article we dis-cussed studies relevant to potential indicators for pre-COPD and proposed the research direction of pre-COPD in the future.