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Table 1 Patient characteristics and overall results from PedsQL 4.0, PedsQL-MFS and SMFQ

From: Health-related quality of life in Norwegian adolescents living with chronic fatigue syndrome

 N%Mean (SD)Median (Q1-Q3)
Gender (Female / Male / Undetermined)50/12/179/19/2  
Age at time of enrolment63 18 (2) 
Duration of fatigue before diagnostic evaluation (months) a)48  15 (10–33)
Duration of fatigue at time of enrolment (months)59  52 (36–67)
Recovered from CFS/ME (yes/no)4/586/94  
Delayed school progression (yes/no)37/1276/24  
Participation in leisure activities (yes/no)21/4134/66  
PedsQL4.0
 Overall HRQoL score (b)(c)63 50 (17) 
 Sub-scale scores: Social functioning63 67 (16) 
  Emotional functioning63 56 (20) 
  Physical functioning63 42 (25) 
  School functioning58 41 (21) 
  Psychosocial functioning63 55 (16) 
PedsQL-MFS
 Overall Fatigue score (b)62 36 (19) 
 Sub-scale scores: Cognitive fatigue62 41 (25) 
  Fatigue related to sleep/rest62 36 (19) 
  General fatigue62 32 (23) 
SMFQ (13 items) Sum score (c)63 7 (5) 
Score < 11 / 11 or higher46/1773/27  
  1. a) Not available data from 15 participants, b) Pearson’s correlation = .861, p < .001 between generic PedsQL4.0 and overall PedsQL-MFS, c) Pearson’s correlation = −.544, p < .001between generic PedsQL 4.0 and SMFQ sum score