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标题：Content validity and reliability of a food frequency questionnaire to measure eicosapentaenoic acid and docosahexaenoic acid intakes in young adults: A pilot study
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作者：Jennifer A. Hanson ; Richard R. Rosenkranz ; Carol Ann Holcomb 等
期刊名称：Functional Foods in Health and Disease
电子版ISSN：2160-3855
出版年度：2012
卷号：2
期号：12
出版社：Food Science Publisher
摘要：Background: The food environment is rapidly changing with regard to omega-3 fatty acids.Research is hindered by the lack of a tool specifically designed to measure intakes of long-chain omega-3 fatty acids in US populations. The purpose of this pilot study was to assess the content validity and reliability of a novel 14-item food frequency questionnaire (FFQ) designed to measure contemporary sources of eicosapentaenoic aid (EPA) and docosahexaenoic acid (DHA).Methods: During May of 2009, college students (n = 165) completed the FFQ and provided feedback. Forty-five completed the questionnaire a second time allowing for the evaluation of test-retest reliability.Results: None of the students reported consuming a food naturally rich in EPA and DHA that was not included in the FFQ. Overall instrument reliability (n = 54) was strong (ρ = 0.86, p < 0.001) and the reliability for each of the non-functional food items ranged from moderate to strong (ρ = 0.48 to 0.86, p < 0.001). Correlation coefficients for each of the functional food items were low and/or non-significant. Uncertainty regarding omega-3 functional foods was listed as a reason by eight of the twelve who felt one or more of the questions were difficult to answer. Conclusions: Overall instrument reliability was strong and content validity was good. Nonetheless, participant feedback, and the decreased test-retest coefficients for the omega-3 functional foods, suggests unfamiliarity may be problematic when measuring intakes from these food sources.
关键词：Functional foods | n-3 fatty acids | dietary assessment | seafood | eicosapentaenoic acid | docosahexaenoic acid