Validity and Reliability of a Quantitative Food Frequency Questionnaire Measuring n-3 Fatty Acid Intakes in Cardiac Patients in the Midwest: A Validation Pilot Study

Department of Nutrition and Health Sciences, University of Nebraska-Lincoln, NE 68583-0806, USA.
Journal of the American Dietetic Association (Impact Factor: 3.92). 09/2006; 106(8):1251-5. DOI: 10.1016/j.jada.2006.05.005
Source: PubMed


The purpose of this pilot study was to test the validity and reliability of a quantitative n-3 fatty acid food frequency questionnaire (FFQ) for later use with larger groups of individuals. A convenience sample of heart patients provided dietary data via three 24-hour food recalls and FFQs. Participants were women (n=17) and men (n=11), 43 to 77 years of age. The association of mean daily intake of n-3 fatty acids obtained using food recalls and the FFQ was assessed by Pearson correlation. The reliability of the FFQ was assessed using coefficient alpha. Correlation of n-3 fatty acid intake using the food recalls and the FFQ was r=0.42 (P<0.05). The coefficient alpha for the test-retest of the FFQ was .83. The top two foods, walnuts and flaxseed, contributed 58% of the n-3 fatty acid intake, and the third food, salmon, contributed 5%. This quantitative n-3 FFQ is a valid instrument for use in place of food recalls for estimating n-3 fatty acid intakes in heart patients and is a reliable instrument to estimate n-3 fatty acid intakes from plant, animal, and seafood sources. The FFQ should be tested in a larger population. Registered dietitians can use this FFQ to screen for intakes, educate patients on food sources, and measure change in intakes after nutrition intervention.

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Available from: Kimberly Heidal, Jan 29, 2014
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    • "A general health history was completed at baseline; at baseline and at trial completion, dietary fatty acid intake and mood were assessed using a validated food frequency questionnaire [7] and two validated self-report mood scales: the Depression Anxiety Stress Scales (DASS) [8] and the Profile of Mood States (POMS) questionnaire [9]. The DASS was designed to measure three distinct but related negative affective states in nonclinical and research populations: depression (DASS-D) assesses dysphoria and anhedonia; anxiety (DASS-A) assesses autonomic arousal and subjective anxiety; and stress (DASS-S) assesses nervous arousal and agitation. "
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    ABSTRACT: Omnivorous diets are high in arachidonic acid (AA) compared to vegetarian diets. Research shows that high intakes of AA promote changes in brain that can disturb mood. Omnivores who eat fish regularly increase their intakes of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), fats that oppose the negative effects of AA in vivo. In a recent cross-sectional study, omnivores reported significantly worse mood than vegetarians despite higher intakes of EPA and DHA. This study investigated the impact of restricting meat, fish, and poultry on mood. Thirty-nine omnivores were randomly assigned to a control group consuming meat, fish, and poultry daily (OMN); a group consuming fish 3-4 times weekly but avoiding meat and poultry (FISH), or a vegetarian group avoiding meat, fish, and poultry (VEG). At baseline and after two weeks, participants completed a food frequency questionnaire, the Profile of Mood States questionnaire and the Depression Anxiety and Stress Scales. After the diet intervention, VEG participants reduced their EPA, DHA, and AA intakes, while FISH participants increased their EPA and DHA intakes. Mood scores were unchanged for OMN or FISH participants, but several mood scores for VEG participants improved significantly after two weeks. Restricting meat, fish, and poultry improved some domains of short-term mood state in modern omnivores. To our knowledge, this is the first trial to examine the impact of restricting meat, fish, and poultry on mood state in omnivores.
    Nutrition Journal 02/2012; 11(1):9. DOI:10.1186/1475-2891-11-9 · 2.60 Impact Factor
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    • "Each reported food and culturally specific dish was analyzed for total n-3 fatty acid, ALA, EPA, and DHA content in grams per medium serving. In addition, foods from the original FFQ [17] were analyzed for ALA, EPA, and DHA content, as this FFQ was only designed to assess total n-3 intake. Food composition analyses were conducted using NDSR 2007 [32]. "
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    ABSTRACT: This study tested the hypothesis that a culturally developed omega-3 (n-3) fatty acid food frequency questionnaire (FFQ) could be an accurate instrument to capture n-3 fatty acid food intakes of first-generation Midwestern Latinas. The goal of the study was to assess validity and test-retest reliability of an FFQ to estimate total n-3 fatty acid (total n-3), α-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) intakes. An n-3 FFQ was developed and pilot tested. Two FFQs and 3 nonconsecutive 24-hour recalls were collected from 162 participants. Pearson correlation and paired t test were used to test the hypothesis. Correlation of the 2 FFQs was 0.71 for total n-3, 0.65 for ALA, 0.74 for EPA, and 0.54 for DHA (P < .01). The means of the 2 FFQs and of the 24-hour recalls were not significantly different for total n-3 and ALA (P > .05), but were significantly different for EPA and DHA. The n-3 FFQ had acceptable reliability, validated only total n-3 and ALA, and provided relevant findings about the n-3 eating habits of Midwestern Latinas.
    Nutrition research 08/2010; 30(8):550-7. DOI:10.1016/j.nutres.2010.07.007 · 2.47 Impact Factor
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