Table 2 Mapping FACIT-Fatigue items to fatigue-related sub-components identified during concept elicitation
Symptom concepts | Impact concepts | ||||||
|---|---|---|---|---|---|---|---|
FACIT-Fatigue item | Tiredness/need for sleep | Lack of energy | Weakness | Cognitive fatigue | Decreased ability to maintain social/familial/professional role | Decreased physical functioning | Frustration |
1. I feel fatigued | ✓ | ✓ | ✓ | ✓ | |||
2. I feel weak all over | ✓ | ||||||
3. I feel listless/washed out | ✓ | ✓ | |||||
4. I feel tired | ✓ | ||||||
5. I have trouble starting things because I am tired | ✓ | ✓ | ✓ | ✓ | |||
6. I have trouble finishing things because I am tired | ✓ | ✓ | ✓ | ✓ | |||
7. I have energy | ✓ | ||||||
8. I am able to do my usual activities | ✓ | ✓ | |||||
9. I need to sleep during the day | ✓ | ||||||
10. I am too tired to eat | ✓ | ||||||
11. I need help doing my usual activities | ✓ | ||||||
12. I am frustrated by being too tired to do the things I want to do | ✓ | ||||||
13. I have to limit my social activity because I am tired | ✓ | ||||||