title: [Rasch Model in the Validation of the Paediatric Quality of Life Inventory™ 4.0 (PedsQL 4.0™) in Colombian Children and Adolescents].
abstract: BACKGROUND
  The aim of this study was to validate the PedsQL 4.0™ in Colombian children and adolescents using the Rasch model. The Paediatric Quality of Life Inventory (PedsQL 4.0™) has demonstrated to be a reliable and sensitive measurement to changes in health status, as well as being quick and easy to use.
  
  
  METHODS
  Validation study of measurement tools. The PedsQL 4.0™ was applied to a convenience sample of 375 children and adolescents between 5 and 17 years old and 500 caregivers of children between 2 and 18 years old in five Colombian cities. The psychometric properties were analysed according to the Rasch model, including adjustment, separation, and differential item functioning (DIF).
  
  
  RESULTS
  The Rasch model provided adequate fits to data. The social dimension, for both versions, had greater difficulty than the physical health dimension. Internal consistency for the items was observed, while for individuals, the values of reliability and separation were lower than that established. The DIF occurred in very few variables, especially when comparing cities. The characteristic curves for the items presented disordered thresholds.
  
  
  CONCLUSIONS
  The items had adequate internal consistency. Analysis showed adequate individual separation, but disordered thresholds were found in the response categories. No DIF was observed by sex or disease, but it is noteworthy that the DIF occurred between cities.
authors: Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia; Health Policy, McMaster University, Hamilton, Canadá. Electronic address: clamavelez@yahoo.es.
authors: Claudia Marcela
authors: CM
authors: Vélez
authors: Instituto de Investigaciones Clínicas, Universidad Nacional de Colombia, Bogotá, Colombia; Facultad de Psicología, Universidad Pontificia Bolivariana, Bucaramanga, Colombia.
authors: Adriana C
authors: AC
authors: Villada Ramírez
authors: Instituto de Investigaciones Clínicas, Universidad Nacional de Colombia, Bogotá, Colombia; Facultad de Psicología, Universidad Pontificia Bolivariana, Bucaramanga, Colombia.
authors: Ana Carolina Amaya
authors: AC
authors: Arias
authors: Vicedecanatura de Investigaciones, Facultad de Medicina, Universidad Nacional de Colombia, Bogotá, Colombia.
authors: Javier H
authors: JH
authors: Eslava-Schmalbach
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D015233:Models, Statistical; D011594:Psychometrics; D011788:Quality of Life
keywords: Análisis de Rasch; Calidad de vida relacionada con la salud; Health-related quality of life (HRQoL); PedsQL 4.0(®); PedsQL 4.0™; Psicometría; Psychometrics; Rasch analysis