title: Comparison of children's diets as reported by the child via the Youth/Adolescent Questionnaire and the parent via the Willett food-frequency questionnaire.
abstract: OBJECTIVE
  A comparison of a parent-completed Willett food-frequency questionnaire (FFQ) and a self-completed Youth/Adolescent Questionnaire (YAQ) has not yet been conducted.
  
  
  METHODS
  In the Diabetes Autoimmunity Study in the Young (DAISY), parents report their child's diet on the FFQ annually from birth until age 10 years, when the child begins to report their own diet using the YAQ.
  
  
  METHODS
  To determine the comparability of these collection methods, 89 children aged 10-17 years and their parents completed the YAQ and FFQ, respectively, for the child's previous year's diet.
  
  
  METHODS
  We compared reported intakes for energy, the macronutrients and a variety of micronutrients of interest to the DAISY study.
  
  
  RESULTS
  Bland-Altman plots of energy-adjusted differences between questionnaire responses against their means suggested that the two collection methods gave similar results. The average Spearman correlation coefficient of all energy-adjusted nutrient intakes was 0.50, and did not differ significantly by gender (males, r=0.48; females, r=0.46) or age (10-11 years, r=0.49; 12-17 years, r=0.51). While correlated, the nutrient values from the FFQ were higher than the nutrient values from the YAQ.
  
  
  CONCLUSIONS
  While reported nutrient intakes are correlated, an indicator variable defining which survey method a nutrient was collected with should be included in any longitudinal data analyses examining nutrient intakes collected with the YAQ and the FFQ as independent predictors of a disease outcome.
authors: University of Colorado at Denver and Health Sciences Center, 4200 East 9th Avenue, Denver, CO 80262, USA.
authors: Molly M
authors: MM
authors: Lamb
authors: Colleen A
authors: CA
authors: Ross
authors: Heather L
authors: HL
authors: Brady
authors: Jill M
authors: JM
authors: Norris
mesh_terms: D000293:Adolescent; D002648:Child; D004032:Diet / Q000706:statistics & numerical data*; D004040:Dietary Carbohydrates / Q000008:administration & dosage; D004041:Dietary Fats / Q000008:administration & dosage; D004044:Dietary Proteins / Q000008:administration & dosage; D002149:Energy Intake; D005260:Female; D006801:Humans; D008297:Male; D011939:Mental Recall; D018977:Micronutrients / Q000008:administration & dosage; D010290:Parents / Q000523:psychology*; D002666:Psychology, Child; D015203:Reproducibility of Results; D012650:Self Disclosure; D012680:Sensitivity and Specificity; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires / Q000592:standards*
chemical_list: D004040:Dietary Carbohydrates; D004041:Dietary Fats; D004044:Dietary Proteins; D018977:Micronutrients