Table 1.

Demographics of the chronic obstructive pulmonary disease (COPD) patients (N=60).

Outcome		Mean (SD) or number
Age in years, mean (SD)		62 (8)
Gender	Female	25
	Male	35
Body mass index (kg/m2), mean (SD)		27 (5)
Forced expiratory volume in 1 second (liters), mean (SD)		1.71 (0.60) (59 [SD 20]% predicted)
Forced vital capacity (liters), mean (SD)		3.61 (0.95) (99 [SD 19]% predicted)
6-minute walking distance (meters), mean (SD)		486 (84) (83 [SD 15]% predicted)
Average steps/day (weekday), mean (SD)		5980 (3035)