BACKGROUND
The role of fixed airflow obstruction (FAO) in asthma is unclear.
OBJECTIVE
To assess the relationship between FAO and clinical features of asthma and the effect of FAO on treatment response.
METHODS
Post hoc descriptive analysis of data stratified by FAO category (screening post-albuterol FEV1/FVC <lower limit of normal [LLN] [FAO+] or ≥LLN… (More)