TABLE 1.
Sample Characteristics
| Characteristic | N | (%) |
|---|---|---|
| Demographic and clinical | ||
| Gender (male) | 113 | (65.3) |
| Race (White) | 110 | (64.3) |
| New York Heart Association class | ||
| I | 5 | (8.9) |
| II | 95 | (54.9) |
| III | 61 | (35.3) |
| IV | 12 | (6.9) |
| M | (SD) | |
| Age (years) | 60.4 | (16.07) |
| Left ventricular ejection fraction (%) | 32.6 | (15.20) |
| Body mass index | 30.7 | (8.03) |
| Charlson Comorbidity Index | 2.5 | (1.52) |
| Sleep disturbance | ||
| Insomnia symptoms (IS) | 6.0 | (3.10) |
| Global sleep quality (PSQI) | 8.7 | (4.20) |
| Respiratory disturbance index (RDI) | 24.3 | (19.00) |
| Daytime symptom | ||
| Fatigue (GFI) | 29.8 | (14.62) |
| Daytime sleepiness (ESS) | 8.3 | (4.34) |
| Depressive symptom (CESD) | 17.0 | (11.01) |
| Functional performance | ||
| Physical function (PF) | 22.7 | (2.17) |
| Six-minute walk (6MWT; feet) | 986 | (435) |
Note. N = 173. CESD = Center for Epidemiologic Studies—Depression Scale; ESS = Epworth Sleepiness Scale; GFI = Global Fatigue Index); IS = Insomnia Symptoms—Sleep Habits Questionnaire; PF = Physical Function Scale—Medical Outcome Studies Short Form-36; PSQI = Pittsburgh Sleep Quality Index.