title: Development and psychometric properties of the PROMIS(®) pediatric fatigue item banks.
abstract: OBJECTIVE
  This paper reports on the development and psychometric properties of self-reported pediatric fatigue item banks as part of the Patient-Reported Outcomes Measurement Information System (PROMIS).
  
  
  METHODS
  Candidate items were developed by using PROMIS qualitative methodology. The resulting 39 items (25 tiredness related and 14 energy related) were field tested in a sample that included 3,048 participants aged 8-17 years. We used confirmatory factor analysis (CFA) to evaluate dimensionality and differential item functioning (DIF) analysis to evaluate parameter stability between genders and by age; we examined residual correlations to evaluate local dependence (LD) among items and estimated the parameters of item response theory (IRT) models.
  
  
  RESULTS
  Of 3,048 participants, 48 % were males, 60 % were white, and 23 % had at least one chronic condition. CFA results suggest two moderately correlated factors. Two items were removed due to high LD, and three due to gender-based DIF. Two item banks were calibrated separately using IRT: Tired and (Lack of) Energy, which consisted of 23 and 11 items, respectively; 10- and 8-item short-forms were created.
  
  
  CONCLUSIONS
  The PROMIS assessment of self-reported fatigue in pediatrics includes two item banks: Tired and (Lack of) Energy. Both demonstrated satisfactory psychometric properties and can be used for research settings.
authors: Department of Medical Social Sciences and Pediatrics, Northwestern University Feinberg School of Medicine, 633 St. Clair Street, #19-039, Chicago, IL, 60611, USA, js-lai@northwestern.edu.
authors: Jin-Shei
authors: JS
authors: Lai
authors: Brian D
authors: BD
authors: Stucky
authors: David
authors: D
authors: Thissen
authors: James W
authors: JW
authors: Varni
authors: Esi Morgan
authors: EM
authors: DeWitt
authors: Debra E
authors: DE
authors: Irwin
authors: Karin B
authors: KB
authors: Yeatts
authors: Darren A
authors: DA
authors: DeWalt
mesh_terms: D000293:Adolescent; D002648:Child; D005163:Factor Analysis, Statistical; D005221:Fatigue / Q000503:physiopathology / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D011594:Psychometrics / Q000295:instrumentation*; D011788:Quality of Life; D057566:Self Report; D011795:Surveys and Questionnaires
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