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Table 3 Demographic data and adherence to the CDC-criteria for CFS

From: Health related quality of life in adolescents with chronic fatigue syndrome: a cross-sectional study

  CFS patients Controls
N = 120 N = 39
Variable n (%) n (%)
Male 34 (28) 11 (28.2)
Female 86 (72) 28 (71.8)
CDC criteria 88 (74) NA
Lives together with both parents 85 (73) 26 (70)
BMI (adjusted for age and gender)   
Normal weight (BMI <25) 100 (83.3) 37 (94.9)
Moderate overweight (25 ≤ BMI < 30) 14 (11.7) 2 (5.1)
Severe overweight (BMI ≥30) 6 (5.0) 0 (0)
MFQ (depressive symptoms)a 47 (39) 3 (8)
Parents highest education   
Primary school 5 (4.3) 0 (0)
Secondary school 30 (26) 8 (23)
Lower university 34 (29) 9 (23)
Higher university 48 (41) 19 (54)
  Mean (SD) Mean (SD)
Age 15.4 (1.6) 15.2 (1.6)
Disease duration (months) 21.4 (15.2) NA
School absence %b 65 (30) 2.1 (6.8)
  1. aMFQ (Mood and feelings Questionnaire) score >20 suggests depressive symptoms and was the cutoff chosen. NA = not applicable. bSchool absence was calculated as the ratio between mean days absent from school last month and days supposed to be at school last month. These proportions are presented as mean values with SD