Are sputum eosinophils associated with a different phenotype in COPD patients? A retrospective study

Sputum eosinophilia in Chronic Obstructive Pulmonary Disease (COPD) patients seems to be associated with a better response to inhaled corticosteroids (ICS). To verify if this feature could identify a specific subpopulation of COPD patients, we retrospectively compared functional and inflammatory parameters of 110 COPD patients according to the presence of sputum eosinophilia (>2%). Patient with eosinophilia were characterized by lower dyspnea...