title: Exploratory and confirmatory factor analysis of the Child Uncertainty in Illness Scale among children with chronic illness.
abstract: OBJECTIVE
  To conduct an exploratory factor analysis (EFA) and a confirmatory factor analysis (CFA) of the Child Uncertainty in Illness Scale (CUIS) with a sample of children and adolescents with a chronic health condition. Developmental differences in factor structure were also examined.
  
  
  METHODS
  A sample of 373 children aged 8-18 years with chronic conditions completed the CUIS as a part of a larger battery of measures.
  
  
  RESULTS
  The EFA yielded a 16-item two-factor model termed Unpredictability/Ambiguity and Comprehension. The CFA yielded a 14-item two-factor model that fits the data very well, where chi2(df = 74) = 95.396, Comparative Fit Index (CFI) = .973, Tucker Lewis Index (TLI) = .967, and Root Mean Square error of approximation (RMSEA) = .038. No developmental differences were found in underlying factor structures: Deltachi2(df = 12) = 17.754, DeltaCFI = .004, DeltaTLI = -.001, and DeltaRMSEA = .000.
  
  
  CONCLUSIONS
  The two-factor CUIS measure could be a useful tool for assessing illness uncertainty among children with chronic illness.
authors.affiliation: The Children's Hospital of Philadelphia, Division of Oncology, 34th Street & Civic Center Boulevard, Room 1487, CHOP North, Philadelphia, Pennsylvania 19104, USA. paia@email.chop.edu
authors.forename: Ahna L H
authors.initials: AL
authors.lastname: Pai
authors.forename: Larry L
authors.initials: LL
authors.lastname: Mullins
authors.forename: Dennis
authors.initials: D
authors.lastname: Drotar
authors.forename: Christopher
authors.initials: C
authors.lastname: Burant
authors.forename: Janelle
authors.initials: J
authors.lastname: Wagner
authors.forename: John M
authors.initials: JM
authors.lastname: Chaney
mesh_terms: D000293:Adolescent; D002648:Child; D002908:Chronic Disease; D003071:Cognition; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D012803:Sick Role; D011795:Surveys and Questionnaires