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Table 1 The symptom items of the FQ and the PHQ-9 scales

From: Norwegian reference data on the Fatigue Questionnaire and the Patient Health Questionnaire-9 and their interrelationship

FQ items PHQ-9 items
1. Problems with tiredness 1. Little interest or pleasure in doing things
2. Needs more rest 2. Feeling down, depressed, or hopeless
3. Feels sleepy or drowsy 3. Trouble falling or staying asleep
4. Problems starting things 4. Feeling tired or having little energy*
5. Lacking energy 5. Poor appetite or overeating
6. Less strength in muscles 6. Feeling bad about yourself
7. Feels weak 7. Trouble concentrating*
8. Difficulty concentrating 8. Changed psycho-motoric tempo
9. Makes slips of tongue when speaking 9. Better off dead or hurting oneself
10. More difficult to find the correct word  
11. Memory problems  
  1. * In italics fatigue items common for the FQ and the PHQ-9. The FQ items #1 and #5 cover the PHQ-9 item #4, the FQ item #8 covers the PHQ-9 item #7