title: Assessment of a short food frequency questionnaire as predictor of hypercholesterolemia in adolescents.
abstract: OBJECTIVE
  To evaluate a short questionnaire as predictor of serum cholesterol obtained from a probabilistic sample of adolescents.
  
  
  METHODS
  A probabilistic sample of 5th to 12th grade students from state public schools in Niteroi, state of Rio de Janeiro, Brazil was drawn based on 28 classes. Five hundred seventy-seven subjects had their blood collected, and 539 answered the simplified questionnaire (23.7% of non-respondents). The questionnaire internal consistence was evaluated through Cronbachs alpha, and agreement between cholesterol levels and food intake was assessed through weighted Kappa (Kw).
  
  
  RESULTS
  Weighted Kappa value was very low (<- 0.05), despite the good internal consistence of the questionnaire (Cronbachs alpha > 0.66).
  
  
  CONCLUSIONS
  The results show that the short questionnaire was not a predictor of cholesterol concentration.
authors.affiliation: Secretaria Municipal de Saúde do Rio de Janeiro, Instituto de Nutrição Josué de Castro da UFRJ e Instituto de Medicina Social da UERJ, Rio de Janeiro, RJ, Brazil. marciaht@click21.com.br
authors.forename: Márcia Henriques
authors.initials: MH
authors.lastname: Teixeira
authors.forename: Gloria Valeria
authors.initials: GV
authors.lastname: da Veiga
authors.forename: Rosely
authors.initials: R
authors.lastname: Sichieri
mesh_terms: D000293:Adolescent; D000328:Adult; D001938:Brazil; D002784:Cholesterol / Q000097:blood*; D015930:Diet Records; D004034:Diet Surveys; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D006937:Hypercholesterolemia / Q000175:diagnosis*; D008297:Male; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D018570:Risk Assessment; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires / Q000592:standards
chemical_list: D002784:Cholesterol