Non-cystic fibrosis (non-CF) bronchiectasis is a chronic, heterogeneous airway disease characterized by irreversible bronchial dilatation, persistent airway infection, and neutrophilic inflammation that together drive daily cough, sputum production, recurrent exacerbations, and progressive functional decline. Sleep is a key determinant of Health-Related Quality of Life (HRQoL) and cardiometabolic health. In chronic lung diseases, nocturnal hypoxemia, cough, dyspnea, and systemic inflammation commonly disrupt sleep continuity and architecture. In bronchiectasis specifically, several studies show high rates of poor sleep quality using the Pittsburgh Sleep Quality Index (PSQI), with \~50-60% of clinically stable patients classified as "poor sleepers," often accompanied by daytime dysfunction. Poor sleep correlates with disease severity indices and symptoms such as nocturnal cough.
Participants are assessed at baseline and followed at 3, 6, 9, and 12 months to evaluate changes in sleep quality over time and their relationships with changes in clinical status, functional measures, quality of life, and subsequent bronchiectasis-related outcomes.