Table 1.

The questions of Chalder Fatigue Scale (CFS).

ITEM	Question
Item 1	Do you have problems with tiredness?
Item 2	Do you need to rest more?
Item 3	Do you feel sleepy or drowsy?
Item 4	Do you have problems starting things?
Item 5	Do you start things without difficulty but get weak as you go on?
Item 6	Are you lacking in energy?
Item 7	Do you have less strength in your muscles?
Item 8	Do you feel weak?
Item 9	Do you have difficulty concentrating?
Item 10	Do you think as clearly as usual?
Item 11	Do 6 you make slips of the tongue when speaking?
Item 12	Do you find it more difficult to find the correct word?
Item 13	Is your memory as good as usual?
Item 14	Are you still interested in the things you used to do?