title: Erratum to: Psychometric evaluation of the Cystic Fibrosis Questionnaire-Revised in a national, US sample.
abstract: OBJECTIVE
  The psychometric properties of a health-related quality of life (HRQOL) instrument, the Cystic Fibrosis Questionnaire-Revised (CFQ-R), were evaluated in a national, US sample of patients with cystic fibrosis (CF). This is the first psychometric evaluation of the revised version of this instrument.
  
  
  METHODS
  The Epidemiologic Study of CF is a national, US multicenter longitudinal cohort study containing CFQ-R and health outcomes data. Developmentally appropriate versions of the CFQ-R were available from 7,330 patients aged 6-70 years and a proxy version from 2,728 parents of school-age children. The CFQ-R was completed during a "stable" or "sick" visit before recording health outcomes such as weight, lung function, and pulmonary exacerbations.
  
  
  RESULTS
  There were few floor and ceiling effects and strong internal consistency (Cronbach alpha ≥0.70) for most scales. The CFQ-R consistently discriminated between patients seen for sick-versus-well visits, and among stages of disease severity based on lung function. As predicted, women with CF reported worse HRQOL than men on scales not related to body image and weight. Strong parent-child agreement was found on scales measuring observable behaviors (respiratory symptoms). Convergence between CFQ-R scales and health outcomes provided evidence of construct validity.
  
  
  CONCLUSIONS
  The CFQ-R demonstrated robust psychometric properties and consistent associations with health outcomes in a large national, US sample. Normative data are available to aid in interpretation.
authors.affiliation: University of Miami, 5665 Ponce de Leon Blvd., Coral Gables, FL 33146, USA. aquittner@miami.edu
authors.forename: Alexandra L
authors.initials: AL
authors.lastname: Quittner
authors.forename: Gregory S
authors.initials: GS
authors.lastname: Sawicki
authors.forename: Ann
authors.initials: A
authors.lastname: McMullen
authors.forename: Lawrence
authors.initials: L
authors.lastname: Rasouliyan
authors.forename: David J
authors.initials: DJ
authors.lastname: Pasta
authors.forename: Ashley
authors.initials: A
authors.lastname: Yegin
authors.forename: Michael W
authors.initials: MW
authors.lastname: Konstan
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003550:Cystic Fibrosis / Q000503:physiopathology*; D005260:Female; D006304:Health Status; D006801:Humans; D008137:Longitudinal Studies; D008168:Lung / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011594:Psychometrics / Q000295:instrumentation; D011788:Quality of Life; D012720:Severity of Illness Index; D018434:Sickness Impact Profile; D014481:United States; D055815:Young Adult