Development, validation and implementation of a quantitative food frequency questionnaire to assess habitual vitamin D intake

Journal of Human Nutrition and Dietetics : the Official Journal of the British Dietetic Association
Máiréad KielyÁ Hennessy

Abstract

A well-designed, validated quantitative food frequency questionnaire (FFQ) could offer an efficient and cost-effective method for assessing habitual vitamin D intake. The present study aimed to describe the development, validation and implementation of a vitamin D FFQ. National food consumption survey data obtained from Irish adults (18-64 years) were used to identify foods that contribute 95% of vitamin D intake. A winter-based validation study was carried out for the resulting FFQ in 120 females, including 98 women [mean (SD) 65.0 (7.3) years] and 22 girls [12.2 (0.8) years], using a 14-day diet history (DH) as a comparator. Serum 25(OH)D concentrations were analysed. Validity coefficients were calculated using the method of triads. Cross-classification and Bland-Altman analysis were also performed. Median (interquartile range) vitamin D intakes (including the contribution from nutritional supplements) were 5.4 (3.7) and 3.7 (5.9) μg day(-1) from the FFQ and DH, respectively and intakes of vitamin D from food sources were 3.6 (3.1) and 2.4 (2.2) μg day(-1) . The FFQ and DH classified 86% and 87% of individuals into the same and adjacent thirds of wintertime serum 25(OH)D status, respectively. There was a strong association (r...Continue Reading

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Citations

Nov 3, 2016·The American Journal of Clinical Nutrition·Charlotte MortensenChristian Mølgaard
Sep 8, 2018·Public Health Nutrition·Charlotte MortensenCamilla T Damsgaard
Feb 17, 2018·European Journal of Nutrition·Charlotte MortensenCamilla T Damsgaard
Aug 5, 2016·The American Journal of Clinical Nutrition·Aoife HayesKevin D Cashman
Nov 14, 2019·Nutrients·D Enette Larson-MeyerTanya M Halliday

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