Relative validity and reliability of an FFQ in youth with type 1 diabetes. Issue 3 (28th March 2014)

• Record Type: Journal Article
• Authors: Liese, Angela D; Crandell, Jamie L; Tooze, Janet A; Fangman, Mary T; Couch, Sarah C; Merchant, Anwar T; Bell, Ronny A; Mayer-Davis, Elizabeth J
• Is Part Of: Public health nutrition. Volume 18:Issue 3(2015)
• Page Start: 428
• Page End: 437
• Publication Date: 2014-03-28
• Subjects: Nutrition -- Periodicals; Nutrition policy -- Periodicals; Public health -- Periodicals; 613.2
• DOI: 10.1017/S1368980014000408
• Languages: English
• ISSNs: 1368-9800

Abstract

<abstract abstract-type="normal"> <title>Abstract</title> <sec id="abs1" sec-type="general"> <title>Objective</title> <p>To evaluate the relative validity and reliability of the SEARCH FFQ that was modified from the Block Kids Questionnaire.</p> </sec> <sec id="abs2" sec-type="general"> <title>Design</title> <p>Study participants completed the eighty-five-item FFQ twice plus three 24 h dietary recalls within one month. We estimated correlations between frequencies obtained from participants with the true usual intake for food groups and nutrients, using a two-part model for episodically consumed foods and measurement error adjustment.</p> </sec> <sec id="abs3" sec-type="general"> <title>Setting</title> <p>The multi-centre SEARCH for Diabetes in Youth Nutrition Ancillary Study.</p> </sec> <sec id="abs4" sec-type="general"> <title>Subjects</title> <p>A subgroup of 172 participants aged 10–24 years with type 1 diabetes.</p> </sec> <sec id="abs5" sec-type="general"> <title>Results</title> <p>The mean correlations, adjusted for measurement error, of food groups and nutrients between the FFQ and true usual intake were 0·41 and 0·38, respectively, with 57 % of food groups and 70 % of nutrients exhibiting correlations >0·35. Correlations were high for low-fat dairy (0·80), sugar-sweetened beverages (0·54), cholesterol (0·59) and saturated fat (0·51), while correlations were poor for high-fibre bread and cereal (0·16) and folate (0·11). Reliability of FFQ intake based on two FFQ administrations was also reasonable, with 54 % of Pearson correlation coefficients ≥0·5. Reliability was high for low-fat dairy (0·7), vegetables (0·6), carbohydrates, fibre, folate and vitamin C (all 0·5), but less than desirable for low-fat poultry and high-fibre bread, cereal, rice and pasta (0·2–0·3).</p> </sec> <sec id="abs6" sec-type="general"> <title>Conclusions</title> <p>While there is some room for improvement, our findings suggest that the SEARCH FFQ performs quite well for the assessment of many nutrients and food groups in a sample of youth with type 1 diabetes.</p> </sec> </abstract>