LATE-BREAKING ABSTRACT: Physical activity and sedentary behaviour in patients with COPD and their resident loved ones

Background: Physical activity and sedentary behaviour are distinct concepts, which are influenced by different factors in COPD. We aimed to compare physical activity and sedentary behaviour between COPD patients and their resident loved ones (i.e., a resident relative), and to compare the same outcome measures in patients after stratification for the physical activity level of their loved ones. Methods: 125 stable COPD patients and 125 resident loved ones were cross-sectional and simultaneously assessed. A triaxial accelerometer was used for a week to measure sedentary behaviour, light activities and moderate-to-vigorous physical activity (MVPA). Participants were considered physically active if they spent ≥30 min of MVPA on ≥5 days per week. Results: Patients spent more time in sedentary behaviour (median (IQR) 616 (566 – 663) vs 558 (498 – 606) min·day -1 ) and less time in light activities (83 (52 – 118) vs 121 (97 – 170) min·day -1 ) and MVPA (12 (2 – 41) vs 31 (16 – 52) min·day -1 ) than their loved ones ( P -1 ; P =0.002) and had a higher likelihood of being active (OR (95% CI) 4.36 (1.41, 13.30); P =0.01) compared to patients with an inactive loved one after controlling for age, body mass index and degree of airflow limitation. Conclusions: COPD patients are more physically inactive and sedentary than their resident loved ones. Nevertheless, patients with a physically active loved one are more active and have a higher likelihood of being active than those with an inactive loved one. Funded by Lung Foundation Netherlands and Boehringer-Ingelheim Netherlands.