title: [Validation of a brief questionnaire to measure the risk of abnormal eating behaviors].
abstract: OBJECTIVE
  To assess the validity and reliability of a questionnaire for the screening of risk eating behaviors.
  
  
  METHODS
  The questionnaire was applied to female high school students in Mexico City in October 2002, as well as to a sample of eating disorder patients seen at the Eating Disorders Unit of the National Institute of Psychiatry between September and December 2002. Statistical methods included internal consistency analysis (Cronbach's alpha) and factor and principal component analysis with oblique rotation. The cutoff point, sensitivity, specificity, and predictive values of the questionnaire were determined using 2 x 2 tables.
  
  
  RESULTS
  The questionnaire showed a high reliability (alpha=0.83) and a three-factor structure with 64.7% of the total explained variance. A discriminant analysis showed that almost 90% of cases were correctly classified.
  
  
  CONCLUSIONS
  This questionnaire is reliable and valid for assessing risk eating behaviors in the study population.
authors.affiliation: Dirección de Investigaciones Epidemiológicas y Psicosociales, Instituto Nacional de Psiquiatria Ramón de la Fuente Muñíz, México, DF, México. unikels@imp.edu.mx
authors.forename: Claudia
authors.initials: C
authors.lastname: Unikel-Santoncini
authors.forename: Ietza
authors.initials: I
authors.lastname: Bojórquez-Chapela
authors.forename: Silvia
authors.initials: S
authors.lastname: Carreño-García
mesh_terms: D000328:Adult; D005247:Feeding Behavior / Q000523:psychology; D001068:Feeding and Eating Disorders / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology; D005260:Female; D006801:Humans; D008800:Mexico / Q000453:epidemiology; D015995:Prevalence; D015203:Reproducibility of Results; D012306:Risk; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires