Patterns of Physical Activity Progression in Patients With COPD

Although mean physical activity in COPD patients declines by 400–500 steps/day annually, it is unknown whether the natural progression is the same for all patients. We aimed to identify distinct physical activity progression patterns using a hypothesis-free approach and to assess their determinants. We pooled data from two cohorts (usual care arm of Urban Training [ NCT01897298 ] and PROactive initial validation [ NCT01388218 ] studies)...