Table 4 Simple statistics and standardized Cronbach coefficient alpha of the fatigue scales
Item | Label | Mean (SD) | Range | Standardized Cronbach coefficient alpha |
|---|---|---|---|---|
Fatigue Severity Scale (FSS) | ||||
1 | My motivation is lower when I am fatigued | 4.3 (1.9) | 1–7 | 0.969 |
2 | Exercise brings on my fatigue | 3.2 (1.7) | 1–7 | 0.970 |
3 | I am easily fatigued | 3.8 (2.3) | 1–7 | 0.967 |
4 | Fatigue interferes with my physical functioning | 3.4 (2.0) | 1–7 | 0.968 |
5 | Fatigue causes frequent problems for me | 3.1 (2.2) | 1–7 | 0.967 |
6 | My fatigue prevents sustained physical functioning | 3.3 (2.2) | 1–7 | 0.967 |
7 | Fatigue interferes with carrying out certain duties and responsibilities | 3.4 (2.1) | 1–7 | 0.967 |
8 | Fatigue is among my most disabling symptoms | 3.4 (2.4) | 1–7 | 0.967 |
9 | Fatigue interferes with my work, family, or social life | 3.6 (2.3) | 1–7 | 0.967 |
Parkinson Fatigue Scale (PFS) | ||||
1 | I have to rest during the day | 3.0 (1.4) | 1–5 | 0.968 |
2 | My life is restricted by fatigue | 2.5 (1.4) | 1–5 | 0.967 |
3 | I get tired more quickly than other people I know | 2.9 (1.5) | 1–5 | 0.967 |
4 | Fatigue is one of my three worst symptoms | 2.8 (1.6) | 1–5 | 0.967 |
5 | I feel completely exhausted | 2.3 (1.4) | 1–5 | 0.967 |
6 | Fatigue makes me reluctant to socialise | 2.2 (1.4) | 1–5 | 0.968 |
7 | Because of fatigue it takes me longer to get things done | 3.0 (1.5) | 1–5 | 0.967 |
8 | I have a feeling of ‘heaviness’ | 2.2 (1.3) | 1–5 | 0.968 |
9 | If I wasn’t so tired I could do more things | 2.8 (1.4) | 1–5 | 0.967 |
10 | Everything I do is an effort | 2.3 (1.3) | 1–5 | 0.967 |
11 | I lack energy for much of the time | 2.6 (1.3) | 1–5 | 0.967 |
12 | I feel totally drained | 2.4 (1.3) | 1–5 | 0.967 |
13 | Fatigue makes it difficult for me to cope with everyday activities | 2.4 (1.3) | 1–5 | 0.967 |
14 | feel tired even when I haven’t done anything | 2.4 (1.3) | 1–5 | 0.968 |
15 | Because of fatigue I do less in my day than I would like | 2.7 (1.4) | 1–5 | 0.967 |
16 | I get so tired I want to lie down wherever I am | 2.1 (1.4) | 1–5 | 0.967 |
Visual Analog Fatigue Scale (VAFS) | ||||
– | Visual Analog Fatigue Scale | 6.5 (2.7) | 2–10 | 0.979 |