Table 4.
Descriptive Statistics: Sleep Quality, Insomnia, Daytime Symptoms, and Functional Performance
| Variables/Measures | Range | Median | Mean(S D) |
|---|---|---|---|
| Sleep Quality (Pittsburgh Sleep Quality Index) | 8–18 | 13 | 13.64(2.91) |
| Insomnia Severity (Insomnia Severity Index) | 11–24 | 17 | 16.55 (4) |
| Dysfunctional Beliefs & Attitudes about Sleep Scale | 2.13–8.06 | 4.25 | 5 (1.86) |
| Depressive Symptoms (CESD) | 7–43 | 20 | 19.55 (10.78) |
| State-Anxiety (STAI-Y) | 22–62 | 41 | 40.36 (10.26) |
| Trait-Anxiety (STAI-Y) | 28–66 | 47 | 42.86 (11.17) |
| Fatigue (Global Fatigue Scale) | 3–10 | 7 | 7.09 (2.51) |
| Daytime Sleepiness (Epworth Scale) | 4–8 | 9 | 8.82 (4.05) |
| Physical Function (SF36v2) | 9–95 | 40 | 38.18 (23.8) |
| Role Physical (SF36v2) | 25–100 | 37.5 | 44.32 (23.29) |
| Bodily Pain (SF36v2) | 22–61 | 31 | 34.27 (13.22) |
| General Health (SF36v2) | 10–82 | 45 | 48 (19.27) |
| Vitality (SF36v2) | 0–81 | 43.75 | 43.75 (23.88) |
| Social Function (SF36v2) | 38–100 | 75 | 69.32 (20.44) |
| Role Emotional (SF36v2) | 8–100 | 58.33 | 58.33 (27.64) |
| Mental Health (SF36v2) | 10–90 | 70 | 62.27 (28.49) |