Early and sustained symptom improvement with umeclidinium/vilanterol versus monotherapy in COPD : a post hoc analysis of the EMAX randomised controlled trial
Background: In chronic obstructive pulmonary disease (COPD), both the time needed for patients to gain symptom improvement with long-acting bronchodilator therapy and whether an early response is predictive of a sustained response is unknown. This study aimed to investigate how quickly meaningful symptom responses are seen in patients with COPD with bronchodilator therapy and whether these respons
