Background & objective: Adults with cystic fibrosis (CF) were assessed to establish whether a relationship exists between inflammation (systemic and/or pulmonary), physical activity and/or exercise tolerance, following in-hospital treatment for an acute exacerbation, and whether these factors can predict for time to next pulmonary exacerbation. In addition to this, demographic information was collected to establish if age, sex, lung function, and/or body mass index is related to the primary study outcomes. [...]