Maintenance inhaler therapy preferences of patients with asthma or chronic obstructive pulmonary disease: a discrete choice experiment

Study (n=810 asthma; 1147 COPD) found patients most valued decreasing the onset of action from 30 to 5 min followed by reducing yearly exacerbations from 3 to 1 and concerns about safety of inhaled corticosteroids and device convenience were relatively less important.