Active, sedentary and sleep behaviours in COPD: longitudinal associations with symptoms and quality of life (QoL) using a compositional approach

Background: People with COPD have suboptimal physical activity (PA), sedentary behaviour (SB) and sleep. This study explored whether change to the 24-hour composition of these behaviours was associated with change in symptoms and QoL, and how reallocation of time between behaviours was associated with change in these outcomes. Methods: Participants were drawn from a RCT of pulmonary rehabilitation and a separate control cohort....