Table 1. Baseline characteristics.
| Variable | Intervention (n = 40) | Control (n = 40) |
|---|---|---|
| Age (yrs) | 66±7 | 67±8 |
| Gender (% male) | 86 | 79 |
| BMI (kgm-2) | 26±6 | 25±6 |
| FEV1 (%pred) | 45±14 | 46±18 |
| FEV1/FVC (%) | 40±10 | 41±12 |
| FRC (%pred) | 156±35 | 159±41 |
| TLco (%pred) | 45±14 | 52±19 |
| 6MWD (m) | 418±103 | 420±115 |
| 6MWD (%pred) | 64±16 | 66±18 |
| QF (%pred) | 69±17 | 77±22 |
| CRDQ total score (20–100) | 78±17 | 84±13 |
| Daily walking time (min) | 33 [16–47] | 29 [17–44] |
| Daily steps (n) | 3408 [1732–5709] | 2574 [1592–4631] |
| Daily Time > 3.6 METs (min) | 17 [4–50] | 12 [2–26] |
| Daily Time > 2.0 METs (min) | 40 [17–109] | 34 [17–69] |
Data are mean ± std or median [interquartile range]. BMI = body mass index, FEV1 = forced expiratory volume in one second, FRC = functional residual capacity, TLco = diffusion capacity for carbon monoxide, 6MWD = six-minute walking distance, QF = quadriceps force, CRDQ = Chronic Respiratory Disease Questionnaire, Daily time > 3.6 METs = daily time spent in activities with an intensity of at least 3.6 metabolic equivalents (moderate and vigorously intense activity), Daily time > 2.0 METs = daily time spent in activities with an intensity of at least 2.0 metabolic equivalents (mild, moderate and vigorously intense activity).