Samantha Goodman1, Barbara Morrongiello2, Janis Randall Simpson3, Kelly Meckling4. 1. Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada. Electronic address: sgoodm01@uoguelph.ca. 2. Department of Psychology, University of Guelph, Guelph, Ontario, Canada. 3. Department of Family Relations and Applied Nutrition, University of Guelph, Guelph, Ontario, Canada. 4. Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada.
Abstract
OBJECTIVE: To establish the validity and reproducibility of the dietary component of a mobile vitamin D calculator app. METHODS: Participants entered their dietary intake into the Vitamin D Calculator app on 3 recording days over 1 month and underwent subsequent 24-hour dietary recalls. RESULTS: There were 50 adults (25 female), aged 18-25 years (mean, 22 ± 2 years). Paired-samples t tests tested for significant differences (P < .05) in mean vitamin D and calcium intake between the app and dietary recalls; Bland-Altman plots assessed agreement between the 2 measures. Intra-class correlations and Wilcoxon signed-rank tests assessed reproducibility of intakes estimated by the app. Mean vitamin D (n = 50) and calcium (n = 48) intakes and risk classifications did not differ significantly between the 2 measures (P > .05). CONCLUSIONS AND IMPLICATIONS: The Vitamin D Calculator app is a valid classification measure for dietary vitamin D and calcium intake. This tool could be used by the general public to increase awareness and intake of these nutrients.
OBJECTIVE: To establish the validity and reproducibility of the dietary component of a mobile vitamin D calculator app. METHODS:Participants entered their dietary intake into the Vitamin D Calculator app on 3 recording days over 1 month and underwent subsequent 24-hour dietary recalls. RESULTS: There were 50 adults (25 female), aged 18-25 years (mean, 22 ± 2 years). Paired-samples t tests tested for significant differences (P < .05) in mean vitamin D and calcium intake between the app and dietary recalls; Bland-Altman plots assessed agreement between the 2 measures. Intra-class correlations and Wilcoxon signed-rank tests assessed reproducibility of intakes estimated by the app. Mean vitamin D (n = 50) and calcium (n = 48) intakes and risk classifications did not differ significantly between the 2 measures (P > .05). CONCLUSIONS AND IMPLICATIONS: The Vitamin D Calculator app is a valid classification measure for dietary vitamin D and calcium intake. This tool could be used by the general public to increase awareness and intake of these nutrients.
Authors: Alyse Davies; Yumeng Shi; Adrian Bauman; Margaret Allman-Farinelli Journal: Int J Environ Res Public Health Date: 2021-05-26 Impact factor: 3.390