title: [Validity and Reliability of the KIDSCREEN-27 Life Quality Questionnaire, Parents' Version, in Medellin, Colombia].
abstract: OBJECTIVE
  Validate the KIDSCREEN-27 for parents in the metropolitan area of Medellín, Colombia, including the Social Acceptance (SA) subscale of KIDSCREEN-52, as it evaluates the effect of bullying in Life Quality of children.
  
  
  METHODS
  The study population was made up by parents of children between 8 and 18, from Medellín and its metropolitan area. A sample of 1,150 parents was estimated according to the different psychometric properties to be measured. Construct validation was made by comparing the mean scores between groups of high and low socioeconomic conditions. The content validity and the measurement of reliability were verified by internal consistency and test-retest stability. The parent-child agreement was also measured.
  
  
  RESULTS
  The internal consistency was adequate (Cronbach alpha 0,76-0,83). Parents of children with better socio-economic status had higher scores in all dimensions (p<0,05). Scores were higher among healthy children. Women had lower scores than men, while children registered higher scores than adolescents. The intraclass correlation coefficient for the reliability assessment was above 0.7 in all dimensions, except in School Environment-SE- (ICC 0,6-0,92). The parent-child agreement reached moderate and good levels (ICC 0,49-0,69). The exploratory factorial analysis, including social acceptance subscale, registered eight dimensions, four of which in agreement with the original questionnaire: Physical activity, SE, Social Support, and SA subscale.
  
  
  CONCLUSIONS
  KIDSCREEN-27 for parents is a valid and reliable instrument to be used in the Colombian context.
authors.affiliation: Médica, especialista en Salud Pública, estudiante de Maestría en Ciencias Clínicas, Grupo Académico de Epidemiología Clínica (GRAEPIC). Profesora de la Facultad de Medicina, de la Universidad de Antioquia, Medellín, Colombia. Electronic address: clamavelez@yahoo.es.
authors.forename: Claudia Marcela
authors.initials: CM
authors.lastname: Vélez
authors.affiliation: Médica, especialista en Medicina Física y Rehabilitación, magíster en Epidemiologia. Profesora, integrante del Grupo Académico de Epidemiologia Clínica (GRAEPIC) y del Grupo de Rehabilitación en Salud, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
authors.forename: Luz Helena
authors.initials: LH
authors.lastname: Lugo
authors.affiliation: Médico y cirujano, magíster en Salud Pública, magíster en Epidemiología. Profesor, integrante del Grupo Académico de Epidemiología Clínica (GRAEPIC), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
authors.forename: Héctor Iván
authors.initials: HI
authors.lastname: García
keywords: Calidad de vida; KIDSCREEN-27; Quality of life; children; estudios de validación; niños; validation studies