Table 1.
Characteristics of Study Participants
| Mean (SD) or n, %
|
|||||
|---|---|---|---|---|---|
| All (n = 388, 100%) | Obstructive (n = 188, 48%) | Restrictive (n = 94, 24%) | CF (n = 53, 14%) | Other (n = 54, 14%) | |
| Demographics | |||||
| Age (years) | 49.4 (11.8) | 55.1 (6.7) | 52.7 (9.4) | 30.1 (8.6) | 42.0 (10.1) |
| Male gender | 170, 43.7% | 85, 45% | 57, 61% | 18, 33% | 11, 20% |
| White ethnicity | 341, 87.7% | 175, 93% | 81, 86% | 51, 94% | 35, 65% |
| Education ≥12 years | 339, 84.5% | 153, 81% | 84, 93% | 50, 93% | 50, 93% |
| Pulmonary function | |||||
| FEV1% | 35.2 (31.6) | 21.0 (7.1) | 53.1 (18.4) | 26.9 (7.2) | 63.0 (22.5) |
| 6MWT (feet) | 1,070 (399) | 950 (355) | 1,168 (420) | 1,302 (326) | 1,083 (429) |
| Oxygen use at rest | |||||
| None | 156, 41% | 52, 29% | 39, 42% | 31, 58% | 34, 65% |
| 1–2 liters/min | 145, 48% | 88, 49% | 32, 35% | 15, 28% | 10, 19% |
| ≥3 liters/min | 77, 20% | 41, 23% | 21, 23% | 7, 13% | 8, 15% |
| Mood | |||||
| BDI-II | 11.8 (7.5) | 12.4 (8.1) | 11.1 (6.8) | 10.6 (6.4) | 12.1 (7.2) |
| STAI-S | 37.2 (11.6) | 38.2 (12.8) | 36.5 (10.0) | 35.2 (8.9) | 37.2 (11.8) |
BDI-II, Beck Depression Inventory-II; CF, cystic fibrosis; FEV1%, percent of predicted normal value for forced expiratory volume in 1 second; 6MWT, 6-minute walk test; STAI-S, State Trait Anxiety Inventory—State Form.