Background: Elevated blood eosinophil counts are linked to worse outcomes in asthma and COPD, but have yet to be well characterized in CF. We hypothesized that higher stable visit blood eosinophil counts are associated with increased rates of lung function decline and pulmonary exacerbations (PEx).
Methods: We performed a retrospective analysis of adult CF patients (≥19 years) enrolled from 2012 to 2018 in a prospective cohort study focused on blood biomarkers.