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Authors

  1. Varagiannis, Panagiotis MSc
  2. Magriplis, Emmanuella PhD
  3. Risvas, Grigoris PhD
  4. Vamvouka, Katerina MSc
  5. Nisianaki, Adamantia BSc
  6. Papageorgiou, Anna PhD
  7. Pervanidou, Panagiota MD, PhD
  8. Chrousos, Georgios MD, PhD
  9. Zampelas, Antonis PhD

Abstract

Background: Many studies derive dietary information from child self-reported Food Frequency Questionnaires (FFQs). This may be subjected to misreporting, especially among overweight and obese children.

 

Aim: The aim of this study was to examine the validity of data acquired from child-reported dietary intake using a semiquantitative FFQ developed for assessing dietary habits of overweight and obese children in Greece, using parental 3-day food records of child intakes.

 

Methods: Validation analysis was based on 106 (from total 115) children (41% boys and 59% girls). Children were asked to report the frequency of their dietary intake, using the FFQ provided. Parents were asked to keep a 3-day food record for their children's intake. Correlations and significance between methods were assessed via Spearman correlation coefficient and Wilcoxon nonparametric pairwise comparisons, respectively. Agreement between the FFQ and the 3-day record was performed using Bland-Altman method.

 

Results: Significant correlations, ranging from 0.32 to 1 (all P < .05), were observed between food consumption reported in the FFQ and recorded in the 3-day dietary record. High correlation was found for fruits ([rho] = 0.988), vegetables ([rho] = 0.985), dairy ([rho] = 0.702), meat ([rho] = 0.958), fish ([rho] = 0.841), starchy foods ([rho] = 0.793), sweets ([rho] = 1), and beverages ([rho] = 0.978). Medium correlation was observed only between the consumption of legumes ([rho] = 0.329). No significant differences were found between reported FFQ and 3-day dietary record for most food groups and beverages examined. Mean intake agreement was ranged from 90.6% to 98.1% (Bland-Altman).

 

Conclusions: The FFQ used appears to be a valid tool for investigating dietary intake of food among overweight and obese children.