TABLE 1

Morbidity of Adolescents With CFS Reported by Pediatric Departments in 2008

CFSHealthy PeersP
Age, mean, SD15.2 (1.9)15.3 (0.6).556a
Gender, % girls8579.250b
Duration of symptoms, mean (SD), mo17 (18.1)
Onset of disease, %
    Acute10
    Gradual68
    Postinfectious22
CIS-20, mean (SD)
    Subscale fatigue severity (range: 8–56)49.8 (6.4)22.6 (10.7).000a
    Subscale concentration problems (range: 5–35)26.5 (6.9)16.3 (7.1).000a
Child Health Questionnaire, mean (SD)
    Subscale physical functioning (range: 0–100)58.6 (20.4)95.1 (7.6).000a
School absence, %Previous 2 wkPrevious 6 moPrevious 2 wkPrevious 6 mo
    Mean (SD)58.5 (33.0)54.2 (29.1)1.5 (3.9)4.9 (6.9).000a
    Minimal (<5%)7.14.091.275.6
    Mild (5%–15%)4.05.05.918.5
    Considerable (15%–50%)34.346.52.95.9
    Severe (50%–75%)18.215.80.00.0
    Almost complete to complete (75%–100%)36.428.70.00.0
Reported CDC symptoms, %
    Mean (SD) (range: 0–8)5.0 (1.6)
    Unrefreshing sleep, %84.4
    Postexertional malaise lasting >24 h, %79.7
    Memory and/or concentration problems, %78.9
    Headaches, %78.1
    Muscle pain, %59.4
    Joint pain, %48.4
    Sore throat, %43.0
    Tender lymph nodes, %31.3
  • a Independent Student t test.

  • b χ2-test/Fisher's Exact test.