Table 2: Mean daily activity in counts per minute in COPD patients () and controls (), stratified for employment status (COPD: employed ()/unemployed (), controls: employed ()/unemployed ()).

COPD patients Controls 95% CI value Day          Employed  Unemployed Morning (8–13 h)          Employed  Unemployed Afternoon (13–17 h)          Employed  Unemployed Evening (17–20 h)           Employed  Unemployed

Data is presented as mean ± SD. 95% CI: 95% confidence interval of the difference.