Validity of an FFQ assessing the vitamin D intake of young Serbian women living in a region without food fortification: the method of triads model
Weiler, Hope A.
Mandić, Ljuba M.
Article (Published version)
MetadataShow full item record
Objective: The objective of the present study was to examine the external validity of an FFQ designed to estimate dietary vitamin D intake compared with a plasma biomarker and three repeated 24 h dietary recalls in women of reproductive age in Serbia, where there is no exposure to food fortified with vitamin D. The method of triads was applied. Design: In a cross-sectional study, 422 women completed the Women and Reproductive Health FFQ (WRH-FFQ) during the winter months. From a representative subgroup (n 44), three 24 h dietary recalls and anthropometric parameters were collected as well as a fasting blood sample for vitamin D biomarker analyses. Correlation coefficients were calculated between each of the dietary methods. Validity coefficients, as a correlation between the measured and estimated 'true' exposure, were calculated using the method of triads. Bland-Altman plots were also constructed. Setting: Three major universities in Serbia. Subjects: Healthy young women (n 422) aged ...18-35 years. Results: The WRH-FFQ estimate of vitamin D intake for all participants was 4.0 (SD 3.3) mu g/d and 3.1 (SD 2.3) mu g/d for the subgroup. Bland-Altman plots for these intakes showed high agreement. Validity coefficients for the FFQ, 24 h recall and biomarker were. rho(QI) = 0.847 (95 % CI 0.564, 0.928), rho(RI) = 0.810 (95 % CI 0.537, 0.997) and rho(BI) = 0.499 (95 % CI 0.190, 0.840), while the correlation coefficients were 0.686, 0.422 and 0.404. Conclusions: The FFQ applied in the present study is a valid tool for assessing dietary vitamin D intake in women living in Serbia, a region without mandatory vitamin D food fortification.
Keywords:FFQ / Vitamin D / Validation / Women / Reproductive health / Method of triads
Source:Public Health Nutrition, 2016, 19, 4, 437-445
- Cambridge Univ Press, Cambridge
- An integral study to identify the regional genetic and environmental risk factors for the common noncommunicable diseases in the human population of Serbia - INGEMA_S (RS-41028)
- Biological effects, nutritional intake and status of folate and polysaturate fatty acid (PUFA): improvement of nutrition in Serbia (RS-41030)
- Traditional and new products of cultivated and wild growing fruits and grape vines, and by-products durring processing, with special emphasis on indigenous varieties: chemical characterization and biological profile (RS-46013)
- Supplementary material: http://cherry.chem.bg.ac.rs/handle/123456789/3658