Chronic obstructive pulmonary disease (COPD) is a common disease and a significant burden worldwide. The clinical symptoms of this disease include progressive dyspnea, cough, expectoration, and wheezing, among others. At present, the primary focus has been on reducing the frequency of acute exacerbations and improving lung function and dyspnea symptoms, and limited attention has been paid to cough and expectoration symptoms, which may be associated with a decrease in lung function, more acute exacerbations, and hospitalizations. Therefore, this outcomes in patients with COPD.
Keywords: COPD; cough; mortality; quality of life.