Table 2.

Mean daily activity in counts per minute in COPD patients (n = 39) and controls (n = 21), stratified for employment status (COPD: employed (n = 7)/unemployed (n = 32), controls: employed (n = 11)/unemployed (n = 10)).

	COPD patients	Controls	95% CI	P value
Day
Employed	1066 ± 409	1091 ± 187	−323; 274	P = 0.865
Unemployed	820 ± 225	1241 ± 352	−611; − 231	P < 0.001
Morning (8–13 h)
Employed	1165 ± 545	1087 ± 307	−344; 501	P = 0.699
Unemployed	958 ± 281	1382 ± 511	−682; − 165	P = 0.002
Afternoon (13–17 h)
Employed	1088 ± 369	1235 ± 304	−486; 192	P = 0.371
Unemployed	804 ± 260	1241 ± 301	−635; − 240	P < 0.001
Evening (17–20 h)
Employed	830 ± 355	911 ± 343	−438; 275	P = 0.634
Unemployed	615 ± 212	1078 ± 343	−647; − 279	P < 0.001

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