Validity and reliability of an omega-3 fatty acid food frequency questionnaire for first-generation Midwestern Latinas

Karina R. Lora, Nancy M. Lewis, Kent M. Eskridge, Kaye Stanek-Krogstrand, Paula Ritter-Gooder

Research output: Contribution to journalArticle

6 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)550-557
Number of pages8
JournalNutrition Research
Issue number8
StatePublished - Aug 1 2010



  • Docosahexaenoic acid
  • Eicosapentaenoic acid
  • Food frequency questionnaire
  • Hispanic Americans
  • Omega-3 fatty acids
  • Reproducibility of results
  • Validation study
  • α-Linolenic acid

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology
  • Nutrition and Dietetics

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