Opin vísindi

Relative validity of a web-based food frequency questionnaire for Danish adolescents

Show simple item record

dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Bjerregaard, Anne A.
dc.contributor.author Halldorsson, Thorhallur
dc.contributor.author Kampmann, Freja B.
dc.contributor.author Olsen, Sjurdur F.
dc.contributor.author Tetens, Inge
dc.date.accessioned 2018-10-03T08:58:14Z
dc.date.available 2018-10-03T08:58:14Z
dc.date.issued 2018-01-12
dc.identifier.citation Bjerregaard, A. A., Halldorsson, T. I., Kampmann, F. B., Olsen, S. F., & Tetens, I. (2018). Relative validity of a web-based food frequency questionnaire for Danish adolescents. Nutrition Journal, 17(1), 9. doi:10.1186/s12937-018-0312-7
dc.identifier.issn 1475-2891
dc.identifier.uri https://hdl.handle.net/20.500.11815/865
dc.description.abstract Background: With increased focus on dietary intake among youth and risk of diseases later in life, it is of importance, prior to assessing diet-disease relationships, to examine the validity of the dietary assessment tool. This study’s objective was to evaluate the relative validity of a self-administered web-based FFQ among Danish children aged 12 to 15 years. Methods: From a nested sub-cohort within the Danish National Birth Cohort, 124 adolescents participated. Four weeks after completion of the FFQ, adolescents were invited to complete three telephone-based 24HRs; administered 4 weeks apart. Mean or median intakes of nutrients and food groups estimated from the FFQ were compared with the mean of 3x24HRs. To assess the level of ranking we calculated the proportion of correctly classified into the same quartile, and the proportion of misclassified (into the opposite quartile). Spearman’s correlation coefficients and de-attenuated coefficients were calculated to assess agreement between the FFQ and 24HRs. Results: The mean percentage of all food groups, for adolescents classified into the same and opposite quartile was 35 and 7.5%, respectively. Mean Spearman’s correlation was 0.28 for food groups and 0.35 for nutrients, respectively. Adjustment for energy and within-person variation in the 24HRs had little effect on the magnitude of the correlations for food groups and nutrients. We found overestimation by the FFQ compared with the 24HRs for fish, fruits, vegetables, oils and dressing and underestimation by the FFQ for meat/poultry and sweets. Median intake of beverages, dairy, bread, cereals, the mean total energy and carbohydrate intake did not differ significantly between the two methods. Conclusion: The relative validity of the FFQ compared with the 3x24HRs showed that the ranking ability differed across food groups and nutrients with best ranking for estimated intake of dairy, fruits, and oils and dressing. Larger variation was observed for fish, sweets and vegetables. For nutrients, the ranking ability was acceptable for fatty acids and iron. When evaluating estimates from the FFQ among Danish adolescents these findings should be considered.
dc.description.sponsorship The study was supported by grants from The Danish Research Council 09–067124 (Center for Fetal Programming), 09–075611; and the Intramural Research Program of The Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health (contract # HHSN275201000020C). The funding bodies had no role in the design of the study, collection, analysis, interpretation of data or in writing the manuscript.
dc.format.extent 9
dc.language.iso en
dc.publisher Springer Nature
dc.relation.ispartofseries Nutrition Journal;17(1)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Dietary assessment
dc.subject School-age children
dc.subject Diet
dc.subject Dietary intake
dc.subject Cohort study
dc.subject Food groups
dc.subject Nutrients
dc.subject Diet recall
dc.subject Mataræði
dc.subject Unglingar
dc.subject Fæðubótarefni
dc.subject Sjúkdómar
dc.subject Næringarfræði
dc.title Relative validity of a web-based food frequency questionnaire for Danish adolescents
dc.type info:eu-repo/semantics/article
dcterms.license This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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.
dc.description.version Peer Reviewed
dc.identifier.journal Nutrition Journal
dc.identifier.doi 10.1186/s12937-018-0312-7
dc.relation.url http://link.springer.com/content/pdf/10.1186/s12937-018-0312-7.pdf
dc.contributor.department Matvæla- og næringarfræðideild (HÍ)
dc.contributor.department Faculty of Food Science and Nutrition (UI)
dc.contributor.school Heilbrigðisvísindasvið (HÍ)
dc.contributor.school School of Health Sciences (UI)

Files in this item

This item appears in the following Collection(s)

Show simple item record