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Table 1 Background characteristics

From: Are there subgroups of chronic fatigue syndrome? An exploratory cluster analysis of biological markers

Total number of participants

116

Sex-no. of males (%)

31 (26.7)

Age, years-mean (SD)

15.4 (1.6)

BMI, kg/m2-mean (SD)

21.5 (4.2)

Disease duration, months-mean (SD)

21.2 (14.7)

Fukuda-no. fulfilling criteria (%)a

85 (75.2)

Canada-no. fulfilling criteria (%)b

46 (41.4)

  1. BMI: Body mass index; SD: Standard deviation
  2. aNumber of patients fulfilling the CDC Fukuda 1994 diagnostic criteria for Chronic Fatigue Syndrome [Fukuda 1994]
  3. bNumber of patients fulfilling the Canada 2003 diagnostic criteria for Chronic Fatigue Syndrome [14]