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Table 2 Mapping FACIT-Fatigue items to fatigue-related sub-components identified during concept elicitation

From: Content validity and psychometric evaluation of the Functional Assessment of Chronic Illness Therapy-Fatigue scale in patients with chronic lymphocytic leukemia

  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        
  1. Abbreviation: FACIT-Fatigue Functional Assessment of Chronic Illness Therapy-Fatigue scale
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