title: Psychometric properties and Dutch norm data of the PedsQL Multidimensional Fatigue Scale for Young Adults.
abstract: OBJECTIVE
  The aim of this study was to assess internal consistency and construct validity (known-groups validity) and to provide Dutch norm data for the Dutch Pediatric Quality of Life Inventory Multidimensional Fatigue Scale for Young Adults ages 18-30 years (PedsQL fatigue_YA).
  
  
  METHODS
  A Dutch sample of 649 young adults completed online a sociodemographic questionnaire and the PedsQL fatigue_YA including three subscales: general fatigue, sleep/rest fatigue and cognitive fatigue (0-100: Higher scores indicate less fatigue symptoms).
  
  
  RESULTS
  The PedsQL fatigue_YA showed satisfactory to good internal consistency (Cronbach's alpha = .70-.94), except for one scale (.68). The mean scale scores were 68.23 (SD 19.15) for 'general fatigue,' 67.04 (SD 15.54) for 'sleep/rest fatigue' and 74.62 (SD 19.02) for 'cognitive fatigue.' Men reported significantly higher scores on 'general fatigue' and 'sleep/rest fatigue' than women. The PedsQL fatigue_YA distinguished between healthy young adults and young adults with chronic health conditions, with higher scores on all scales in healthy young adults than in those with a chronic health condition.
  
  
  CONCLUSIONS
  The results demonstrate good psychometric properties of the PedsQL fatigue_YA in a sample of Dutch young adults. With the current norms available, it is possible to evaluate fatigue in the Netherlands from childhood to adulthood with the PedsQL Multidimensional Fatigue Scale.
authors.affiliation: Psychosocial Department, Emma Children's Hospital, Academic Medical Center, A3-241, Postbox 22660, 1100 DD, Amsterdam, the Netherlands, l.haverman@amc.nl.
authors.forename: Lotte
authors.initials: L
authors.lastname: Haverman
authors.forename: Perrine F
authors.initials: PF
authors.lastname: Limperg
authors.forename: Hedy A
authors.initials: HA
authors.lastname: van Oers
authors.forename: Marion A J
authors.initials: MA
authors.lastname: van Rossum
authors.forename: Heleen
authors.initials: H
authors.lastname: Maurice-Stam
authors.forename: Martha A
authors.initials: MA
authors.lastname: Grootenhuis
mesh_terms: D000328:Adult; D002648:Child; D002908:Chronic Disease; D005221:Fatigue / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D009426:Netherlands; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D017678:Sex Distribution; D012890:Sleep / Q000502:physiology*; D011795:Surveys and Questionnaires; D055815:Young Adult