Table 1.
Baseline Clinical and Demographic Characteristics
| Characteristic | Control (n = 107) | Intervention (n = 108) |
|---|---|---|
| Age, yr | 68.1 (9.2) | 67.9 (9.8) |
| Site | ||
| HealthPartners Regions Hospital | 52 (49%) | 52 (48%) |
| Mayo Clinic | 55 (51%) | 56 (52%) |
| Postsecondary education | 48 (48%) | 55 (54%) |
| Medicare coverage | 82 (82%) | 79 (77%) |
| Married | 48 (46%) | 54 (50%) |
| Male sex | 51 (48%) | 46 (43%) |
| Continuous supplemental oxygen | 32 (34%) | 40 (40%) |
| Supplemental oxygen with activity or sleep | 49 (51%) | 54 (53%) |
| Patient-reported exacerbation | ||
| Within the last 12 mo | 79 (90%) | 83 (86%) |
| Two or more exacerbations in past 12 mo | 61 (71%) | 61 (69%) |
| Hospitalization in past 12 mo | 60% | 57% |
| Charlson comorbidity index | 3.0 (1.5) | 3.7 (1.8) |
| FEV1, % predicted | 40.3 (17.2) | 40.5 (17.1) |
| TLC, % predicted | 115.2 (25.2) | 110.0 (24.4) |
| RV, % predicted | 173.7 (58.0) | 174.6 (72.8) |
| DlCO, % predicted | 38.7 (23.1) | 35.8 (19.3) |
| mMRC score | ||
| 0 | 3 (3%) | 2 (2%) |
| 1 | 18 (20%) | 11 (12%) |
| 2 | 9 (10%) | 12 (13%) |
| 3 | 51 (57%) | 62 (67%) |
| 4 | 9 (10%) | 6 (6%) |
| CRQ quality of life domains | ||
| Physical function (dyspnea and fatigue) | 4.1 (1.2) | 4.1 (1.1) |
| Emotional function (mastery and emotion) | 4.7 (1.4) | 4.6 (1.2) |
| Daily physical activity | ||
| Steps | 2,789.9 (3,000.7) | 2,448.0 (2,030.7) |
| Physical activity level | 1.3 (0.2) | 1.3 (0.2) |
| Sedentary (<2 METS), min | 1,220.5 (175.5) | 1,239.8 (125.0) |
| Light activity (2–4 METS), min | 130.0 (107.5) | 133.4 (115.5) |
| Moderate activity (4–6 METS), min | 14.0 (29.0) | 8.0 (12.6) |
| Vigorous activity (>6 METS), min | 0.7 (2.5) | 0.3 (0.9) |
| Resting metabolic rate, cal/24 h | 1,590.3 (379.4) | 1,529.8 (309.7) |
| Total energy expenditure, cal/24 h | 2,069.8 (495.5) | 2,016.7 (442.8) |
Definition of abbreviations: CRQ = Chronic Respiratory Disease Questionnaire; DlCO = diffusing capacity of the lung for carbon monoxide; METS = metabolic equivalents; mMRC = modified Medical Research Council dyspnea scale; RV = residual volume; TLC = total lung capacity.
Data are presented as mean (SD) or count (%).