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Table 1 Baseline clinical characteristics of chronic fatigue syndrome patients (cases) and non-fatigued controls

From: Longitudinal investigation of natural killer cells and cytokines in chronic fatigue syndrome/myalgic encephalomyelitis

  Cases (n=65) Controls (n=21)
Age, mean in years (SD) 47.2 (11.5) 45.2 (9.3)
Female (%) 75.4 66.7
BMI kg/m2 (SD) 24.4 (4.9) 25.3 (5.5)
Smoked in the past 2 years (%) 4.7 4.8
Symptom (%)   
Weakness >24 hours after exercise 93.8 9.5
Unrefreshing sleep 93.8 19.0
Impaired concentration 90.8 4.8
Muscle pain 81.5 14.3
Joint pain 70.8 9.5
Headaches 67.7 9.5
Lymph glands 43.1 0
Sore throat 46.2 8.0
Diagnosed with depression or anxiety 64.6 19.0