Assessing validity of a short food frequency questionnaire on present dietary intake of elderly Icelanders.

2.50
Hdl Handle:
http://hdl.handle.net/2336/239891
Title:
Assessing validity of a short food frequency questionnaire on present dietary intake of elderly Icelanders.
Authors:
Eysteinsdottir, Tinna; Thorsdottir, Inga; Gunnarsdottir, Ingibjorg; Steingrimsdottir, Laufey
Citation:
Nutr. J. 2012, 11:12
Issue Date:
2012
Abstract:
Few studies exist on the validity of food frequency questionnaires (FFQs) administered to elderly people. The aim of this study was to assess the validity of a short FFQ on present dietary intake, developed specially for the AGES-Reykjavik Study, which includes 5,764 elderly individuals. Assessing the validity of FFQs is essential before they are used in studies on diet-related disease risk and health outcomes. 128 healthy elderly participants (74 y ± 5.7; 58.6% female) answered the AGES-FFQ, and subsequently filled out a 3-day weighed food record. Validity of the AGES-FFQ was assessed by comparing its answers to the dietary data obtained from the weighed food records, using Spearman's rank correlation, Chi-Square/Kendall's tau, and a Jonckheere-Terpstra test for trend. For men a correlation ≥ 0.4 was found for potatoes, fresh fruits, oatmeal/muesli, cakes/cookies, candy, dairy products, milk, pure fruit juice, cod liver oil, coffee, tea and sugar in coffee/tea (r = 0.40-0.71). A lower, but acceptable, correlation was also found for raw vegetables (r = 0.33). The highest correlation for women was found for consumption of rye bread, oatmeal/muesli, raw vegetables, candy, dairy products, milk, pure fruit juice, cod liver oil, coffee and tea (r = 0.40-0.61). An acceptable correlation was also found for fish topping/salad, fresh fruit, blood/liver sausage, whole-wheat bread, and sugar in coffee/tea (r = 0.28-0.37). Questions on meat/fish meals, cooked vegetables and soft drinks did not show a significant correlation to the reference method. Pearson Chi-Square and Kendall's tau showed similar results, as did the Jonckheere-Terpstra trend test. A majority of the questions in the AGES-FFQ had an acceptable correlation and may be used to rank individuals according to their level of intake of several important foods/food groups. The AGES-FFQ on present diet may therefore be used to study the relationship between consumption of several specific foods/food groups and various health-related endpoints gathered in the AGES-Reykjavik Study.
Description:
To access publisher full text version of this article. Please click on the hyperlink in Additional Links field.
Additional Links:
http://dx.doi.org/10.1186/1475-2891-11-12

Full metadata record

DC FieldValue Language
dc.contributor.authorEysteinsdottir, Tinnaen_GB
dc.contributor.authorThorsdottir, Ingaen_GB
dc.contributor.authorGunnarsdottir, Ingibjorgen_GB
dc.contributor.authorSteingrimsdottir, Laufeyen_GB
dc.date.accessioned2012-08-24T11:12:27Z-
dc.date.available2012-08-24T11:12:27Z-
dc.date.issued2012-
dc.date.submitted2012-08-24-
dc.identifier.citationNutr. J. 2012, 11:12en_GB
dc.identifier.issn1475-2891-
dc.identifier.pmid22413931-
dc.identifier.doi10.1186/1475-2891-11-12-
dc.identifier.urihttp://hdl.handle.net/2336/239891-
dc.descriptionTo access publisher full text version of this article. Please click on the hyperlink in Additional Links field.en_GB
dc.description.abstractFew studies exist on the validity of food frequency questionnaires (FFQs) administered to elderly people. The aim of this study was to assess the validity of a short FFQ on present dietary intake, developed specially for the AGES-Reykjavik Study, which includes 5,764 elderly individuals. Assessing the validity of FFQs is essential before they are used in studies on diet-related disease risk and health outcomes. 128 healthy elderly participants (74 y ± 5.7; 58.6% female) answered the AGES-FFQ, and subsequently filled out a 3-day weighed food record. Validity of the AGES-FFQ was assessed by comparing its answers to the dietary data obtained from the weighed food records, using Spearman's rank correlation, Chi-Square/Kendall's tau, and a Jonckheere-Terpstra test for trend. For men a correlation ≥ 0.4 was found for potatoes, fresh fruits, oatmeal/muesli, cakes/cookies, candy, dairy products, milk, pure fruit juice, cod liver oil, coffee, tea and sugar in coffee/tea (r = 0.40-0.71). A lower, but acceptable, correlation was also found for raw vegetables (r = 0.33). The highest correlation for women was found for consumption of rye bread, oatmeal/muesli, raw vegetables, candy, dairy products, milk, pure fruit juice, cod liver oil, coffee and tea (r = 0.40-0.61). An acceptable correlation was also found for fish topping/salad, fresh fruit, blood/liver sausage, whole-wheat bread, and sugar in coffee/tea (r = 0.28-0.37). Questions on meat/fish meals, cooked vegetables and soft drinks did not show a significant correlation to the reference method. Pearson Chi-Square and Kendall's tau showed similar results, as did the Jonckheere-Terpstra trend test. A majority of the questions in the AGES-FFQ had an acceptable correlation and may be used to rank individuals according to their level of intake of several important foods/food groups. The AGES-FFQ on present diet may therefore be used to study the relationship between consumption of several specific foods/food groups and various health-related endpoints gathered in the AGES-Reykjavik Study.en_GB
dc.description.sponsorshipIcelandic Research Fund for Graduate Students,en_GB
dc.language.isoenen
dc.relation.urlhttp://dx.doi.org/10.1186/1475-2891-11-12en_GB
dc.rightsArchived with thanks to Nutrition journalen_GB
dc.subject.meshAgeden_GB
dc.subject.meshAnimalsen_GB
dc.subject.meshCod Liver Oilen_GB
dc.subject.meshCoffeeen_GB
dc.subject.meshDairy Productsen_GB
dc.subject.meshDieten_GB
dc.subject.meshDiet Recordsen_GB
dc.subject.meshDiet Surveysen_GB
dc.subject.meshEnergy Intakeen_GB
dc.subject.meshFemaleen_GB
dc.subject.meshFood Habitsen_GB
dc.subject.meshFruiten_GB
dc.subject.meshGeriatric Assessmenten_GB
dc.subject.meshHumansen_GB
dc.subject.meshIcelanden_GB
dc.subject.meshInterviews as Topicen_GB
dc.subject.meshMaleen_GB
dc.subject.meshMeaten_GB
dc.subject.meshNutrition Assessmenten_GB
dc.subject.meshQuestionnairesen_GB
dc.subject.meshSex Factorsen_GB
dc.subject.meshTeaen_GB
dc.subject.meshVegetablesen_GB
dc.titleAssessing validity of a short food frequency questionnaire on present dietary intake of elderly Icelanders.en
dc.typeArticleen
dc.contributor.departmentUnit for Nutrition Research, University of Iceland and Landspitali National-University Hospital, Reykjavik, Icelanden_GB
dc.identifier.journalNutrition journalen_GB
dc.rights.accessOpen Access - Opinn aðganguren
dc.type.categoryNæringarfræðien_GB

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