Table 1 Demographic and clinical characteristics of patients and healthy control subjects

Demographic

   Number

33

33

   Age, mean years (SD)

45.6 (11.8)

44.1 (13.1)

   Female, n (%)

26 (79)

28 (85)

Clinical

   CFS criteria met, n (%)

25 (76)

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   Idiopathic chronic fatigue criteria met n (%)

7 (21)

   Fibromyalgia criteria met ¹, n (%)

9 (27)

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