“Can do, do do” quadrants and 6-year all-cause mortality in patients with COPD

Physical capacity (‘can do’) and physical activity (‘do do’) are prognostic indicators in COPD and can be used to subdivide COPD patients into four exclusive subgroups (the so-called “can do, do do” quadrants). The research question of the current study is: What is the 6-year all-cause mortality risk of the “can do, do do” quadrants of patients with COPD?