Filippi, Anna Rita, Amodio, Emanuele, Napoli, Giuseppe, Breda, João, Bianco, Antonino, Jemni, Monèm, Censi, Laura, Mammina, Caterina and Tabacchi, Garden (2014) The web-based ASSO-food frequency questionnaire for adolescents: relative and absolute reproducibility assessment. Nutrition Journal, 13:119. ISSN 1475-2891 (doi:10.1186/1475-2891-13-119)

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Abstract

Background: A new food frequency questionnaire (FFQ) has been recently developed within the Italian Adolescents and Surveillance System for the Obesity prevention (ASSO) Project; it was found to be appropriate for ranking adolescents in food and nutrient levels of intake. The aim of this study was to assess the relative and absolute reproducibility of the ASSO-FFQ for 24 food groups, energy and 52 nutrients.

Methods: A test-retest study was performed on two ASSO-FFQs administered one month apart of each other to 185 adolescents, aged 14–17 and attending secondary schools in Palermo (Italy). Wilcoxon test assessed differences in median daily intakes between the two FFQs. Agreement was evaluated by quintiles comparison and weighted kappa. Intraclass Correlation Coefficients (ICC) and Bland-Altman method assessed the relative and absolute reliability respectively.

Results: Significant difference (p < 0.05) in median intakes was found only for bread substitutes, savoury food,
water, soft drinks, carbohydrates and sugar. The subjects classified into the same or adjacent quintiles for food
groups ranged from 62% (white bread) to 91% (soft drinks); for energy and nutrients from 64% (polyunsaturated fatty acids) to 90% (ethanol). Mean values of weighted kappa were 0.47 and 0.48, respectively for food groups and nutrients. Fair to good ICC values (>0.40) were assessed for thirteen food groups, energy and forty-three nutrients. Limits of Agreement were narrow for almost all food groups and all nutrients.

Conclusions: The ASSO-FFQ is a reliable instrument for estimating food groups, energy and nutrients intake in adolescents.

Item Type:	Article
Additional Information:	[1] Copyright: (C) 2014 Filippi et al.; licensee BioMed Central. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. [2] Cite this article as: Filippi et al.: The web-based ASSO-food frequency questionnaire for adolescents: relative and absolute reproducibility assessment. Nutrition Journal 2014 13:119. doi:10.1186/1475-2891-13-119. [3] Acknowledgement (funding): The work has been performed within the Adolescents and Surveillance System for the Obesity prevention (ASSO) Project (code GR-2008-1140742, CUP I85J10000500001), a young researchers project funded by the Italian Ministry of Health.
Uncontrolled Keywords:	food frequency questionnaire, reproducibility, adolescent, nutrient, intake
Subjects:	R Medicine > R Medicine (General) R Medicine > RA Public aspects of medicine
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science
Related URLs:	Publisher
Last Modified:	15 Oct 2016 11:01
URI:	http://gala.gre.ac.uk/id/eprint/13198

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