title: Adaptation and validation of an FFQ for 6-10-year-old children.
abstract: OBJECTIVE
  To adapt and test the relative validity of an instrument measuring the usual food intake of 6-10-year-old children.
  
  
  METHODS
  An FFQ encompassing the preceding 6 months was adapted and compared with the average of three 24 h dietary recalls.
  
  
  METHODS
  Private and public schools in Porto Alegre, capital city of Rio Grande do Sul, the southernmost state in Brazil, with 1·5 million inhabitants.
  
  
  METHODS
  Children aged 6-10 years attending grades 1-4 in private and public schools in Porto Alegre.
  
  
  RESULTS
  Ninety-one children were studied. The FFQ overestimated all nutrients. Correlations with the values obtained by 24 h dietary recalls were mostly above 0·50. The deattenuated correlations increased for all nutrients. The κ coefficients for the adjusted nutrients varied from 0·12 (weak) to 0·34 (reasonable). Graphically, the FFQ was shown to underestimate some of the parameters and to overestimate others, with a wide CI for all nutrients.
  
  
  CONCLUSIONS
  The FFQ does not have the required relative validity to classify the intake levels of schoolchildren, and further investigation is required to understand the sources of error.
authors.affiliation: Programa de Pós-Graduação em Ciências Médicas: Endocrinologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors.forename: Daisy Lopes
authors.initials: DL
authors.lastname: Del Pino
authors.forename: Rogério
authors.initials: R
authors.lastname: Friedman
mesh_terms: D000886:Anthropometry; D001938:Brazil; D002648:Child; D002664:Child Nutritional Physiological Phenomena / Q000502:physiology*; D004034:Diet Surveys / Q000295:instrumentation*; D002149:Energy Intake; D005260:Female; D006801:Humans; D008297:Male; D011939:Mental Recall; D015596:Nutrition Assessment; D009748:Nutrition Disorders / Q000175:diagnosis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires / Q000592:standards*