Publication: Validation of a food frequency questionnaire for assessing total antioxidant status
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Date
2022-04-01
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Abstract
Objective: To evaluate the validity of a food frequency questionnaire (FFQ) developed as a tool for
assessing antioxidant intake and to investigate whether dietary total antioxidant status predicted plasma
antioxidant status.
Material and methods: This research was conducted at Sagl ık Bilimleri University Faculty of Medicine
Immunology. Dietary intake of total antioxidants was assessed using an FFQ (82 food items), which was
adopted from Satia et al. and translated into Turkish. Total antioxidant status (TAS) in plasma was
assessed using enzyme-linked immunosorbent assay (ELISA) in overnight-fasting blood. The validation of
the questionnaire against plasma TAS was examined using Spearman's correlation test, BlandeAltman
plots, and kappa statistics.
Results: The mean age of the 45 study participants (19 women and 26 men) was 45.9 ± 11.0 years. The
mean plasma TAS level was 13.8 ± 6.1 mg/L, and the mean intake of total antioxidants was
114.0 ± 134.6 mg/day. There was a positive correlation between plasma TAS and the intake of total
antioxidants calculated using the FFQ (r ¼ 0.73; p < 0.001). Cronbach's alpha coefficient of the questionnaire was 0.949.
Conclusion: The FFQ adapted to the Turkish population and tested here was a good predictor for dietary
intake of total antioxidant status.
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Sağlık Bilimleri, Beslenme ve Dietetik, Tarımsal Bilimler, Ziraat, Health Sciences, Nutrition and Dietetics, Agricultural Sciences, Agriculture, BESLENME VE DİYETETİK, Tarım Bilimleri, Tarım ve Çevre Bilimleri (AGE), NUTRITION & DIETETICS, AGRICULTURAL SCIENCES, Agriculture & Environment Sciences (AGE), Antioxidants, Validation study, Nutrition assessment, CAPACITY, YOUNG, SERUM, DIET
Citation
Oztag M., GÜNEŞ F. E., "Validation of a food frequency questionnaire for assessing total antioxidant status", CLINICAL NUTRITION ESPEN, cilt.48, ss.351-355, 2022