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Table 1 Characteristics by subject classification (N = 164). BMI is body mass index, CFS includes subjects with chronic fatigue syndrome, ISF includes those with unexplained chronic fatigue not meeting criteria for CFS, and NF are never fatigued controls

From: Psychometric properties of the CDC Symptom Inventory for assessment of Chronic Fatigue Syndrome

  N Women (%) Age (Mean ± SD) BMI (Mean ± SD)
Classification     
   CFS 52 44 (84.6%) 49.9 ± 7.9 28.4 ± 5.1
   ISF 40 29 (72.5%) 49.7 ± 9.3 28.7 ± 4.7
   Remission 24 17 (70.8%) 51.2 ± 9.1 28.8 ± 5.1
   Never Fatigued 48 41 (85.4%) 50.3 ± 8.5 28.9 ± 5.1