Table 3. Hierarchical regressions for the dependent variables; Chalder Fatigue Scale, Cognitive Failures Questionnaire, Trail Making Task and Epworth Sleepiness Scale.
| Dependent Variable | ||||||||
|---|---|---|---|---|---|---|---|---|
| Chalder Fatigue Scale (N = 101) | Epworth Sleepiness Scale (N = 101) | Cognitive Failures Questionnaire (N = 89) | Trail Making Task (N = 96) | |||||
| Variables in the model | β | t | β | t | β | t | β | t |
| Step 1 | ||||||||
| Constant | 10.11 | 3.54 | 5.07 | 5.03 | ||||
| Length of Disease | -0.41** | -3.27 | 0.00 | 0.01 | 0.13 | 1.17 | -0.03 | -0.28 |
| Age | 0.23* | 2.22 | 0.15 | 1.36 | 0.08 | 0.75 | 0.11 | 0.99 |
| Gender | -0.09 | -0.96 | 0.03 | 0.33 | 0.09 | 0.82 | -0.24* | -2.36 |
| Adj. R2 | 0.08 | -0.01 | 0.00 | 0.03 | ||||
| F | 4.05** | 0.75 | 1.05 | 2.12 | ||||
| Step 2 | ||||||||
| Constant | 8.04 | 1.68 | 2.90 | 3.32 | ||||
| Length of Disease | -0.31** | -3.20 | 0.00 | 0.03 | 0.12 | 1.30 | -0.01 | -0.05 |
| Age | 0.11 | 1.06 | 0.10 | 0.93 | -0.08 | -0.84 | 0.01 | 0.10 |
| Gender | -0.00 | -0.04 | 0.09 | 0.89 | 0.24* | 2.48 | -0.17 | -1.67 |
| Anxiety | -0.02 | -0.17 | 0.27* | 2.41 | 0.33** | 3.10 | 0.04 | 0.31 |
| Depression | 0.42*** | 3.77 | 0.11 | 2.41 | 0.34** | 3.02 | 0.33** | 2.70 |
| Adj. R2 | 0.22 | 0.09 | 0.96 | 0.30 | 0.13 | |||
| F | 6.61*** | 3.05* | 8.41*** | 3.73** | ||||
| Step 3 | ||||||||
| Constant | 3.38 | -0.79 | 2.40 | 2.24 | ||||
| Length of Disease | -0.41*** | -3.94 | 0.07 | 0.59 | 0.10 | 0.96 | -0.02 | -0.20 |
| Age | 0.07 | 0.62 | 0.11 | 1.03 | -0.12 | -1.17 | -0.03 | -0.31 |
| Gender | -0.01 | -0.09 | 0.11 | 1.16 | 0.23* | 2.37 | -0.16 | -1.64 |
| Anxiety | -0.08 | -0.68 | 0.29* | 2.48 | 0.32** | 2.86 | -0.02 | -0.20 |
| Depression | 0.45*** | 4.02 | 0.12 | 1.04 | 0.30* | 2.55 | 0.35** | 2.81 |
| SE (%) | 0.05 | 0.39 | 0.20 | 1.66 | -0.17 | -1.43 | -0.10 | -0.80 |
| NWAK | -0.18 | -1.52 | 0.07 | 0.54 | 0.11 | 0.88 | -0.11 | -0.85 |
| WASO (min) | 0.34** | 2.47 | -0.09 | -0.58 | -0.02 | -0.11 | 0.01 | 0.08 |
| SOL (min) | -0.03 | -0.28 | 0.02 | 0.18 | 0.01 | 0.08 | -0.05 | -0.46 |
| Total Napping (min) | -0.05 | -0.55 | 0.17 | 1.76 | 0.06 | 0.62 | 0.22* | 2.19 |
| Adj. R2 | 0.24 | 0.14 | 0.30 | 0.14 | ||||
| F | 4.10*** | 2.57** | 4.76*** | 2.49* | ||||
Notes:
*p < .05,
** p < .01,
*** p < .001;
Entries represent standardized beta coefficients.
SE, sleep efficiency; NWAK, number of awakenings; WASO, wake after sleep onset; SOL, sleep onset latency