Table 1.
Demographic and clinical characteristics at baseline.
| CBT-I | COPD-ED | ||||
|---|---|---|---|---|---|
| Characteristics | All Participants (n = 109) | Yes (n = 55) | No (n = 54) | Yes (n = 55) | No (n = 54) |
| Age, y | 65 ± 8 | 64 ± 8 | 65 ± 9 | 65 ± 8 | 64 ± 9 |
| Women, % | 36% | 36% | 35% | 36% | 36% |
| FEV1, % predicted | 66.8 ± 23.6 | 67.2 ± 23.7 | 66.4 ± 23.8 | 67.3 ± 24.8 | 66.2 ± 22.5 |
| FEV1/FVC | 55.0 ± 11.5 | 55.5 ± 12.0 | 54.5 ± 11.1 | 55.1 ± 11.6 | 55.0 ± 11.6 |
| BMI, kg/m2 | 27.2 ± 6.1 | 27.6 ± 6.3 | 26.8 ± 5.9 | 27.2 ± 7.1 | 27.2 ± 5.0 |
| Race, % | |||||
| Black | 73% | 80% | 67% | 74% | 73% |
| White | 23% | 18% | 28% | 20% | 23% |
| Unknown or other | 4% | 2% | 5% | 6% | 4% |
| Education, % | |||||
| > High school | 66% | 75% | 80% | 80% | 74% |
| ≤ High school | 34% | 25% | 20% | 20% | 26% |
| Smoking, pack-years | 31.8 ± 26.3 | 30.0 ± 21.6 | 33.5 ± 30.4 | 32.5 ± 28.8 | 31.1 ± 24.0 |
| Apnea-hypopnea index, events/h | 5.1 ± 3.4 | 5.5 ± 3.3 | 4.7 ± 3.4 | 5.3 ± 3.4 | 5.0 ± 3.4 |
| Baseline SaO2, % | 93.4 ± 2.7 | 93.1 ± 2.6 | 93.6 ± 2.8 | 93.2 ± 2.9 | 93.5 ± 2.5 |
| Inhaled beta-agonist, % | 82.41% | 80% | 83% | 84% | 82% |
| Oral beta-agonists, % | 100% | 100% | 98% | 100% | 99% |
| Inhaled glucocorticoid, % | 51.85% | 56% | 46% | 53% | 52% |
| Inhaled anticholinergic, % | 49.07% | 45% | 60% | 45% | 49% |
Data are presented as mean ± SD unless otherwise indicated. BMI = body mass index, CBT-I = cognitive behavioral therapy for insomnia, COPD-ED = chronic obstructive pulmonary disease education, FEV1 = forced expiratory volume in 1 second, FVC = forced vital capacity, SaO2 = arterial oxygen saturation, SD = standard deviation.