| Autor: |
Zouine N; Cluster of Competency 'Environment and Health', Faculty of Sciences, Moulay Ismail University, Meknes 50000, Morocco.; Higher Institute of Nursing and Health Professions of Fes-Meknes Annex, Meknes 50000, Morocco., Lhilali I; Cluster of Competency 'Environment and Health', Faculty of Sciences, Moulay Ismail University, Meknes 50000, Morocco.; Higher Institute of Nursing and Health Professions of Fes-Meknes Annex, Meknes 50000, Morocco., Menouni A; Cluster of Competency 'Environment and Health', Faculty of Sciences, Moulay Ismail University, Meknes 50000, Morocco.; Health and Environment Unit, Faculty of Medicine, KU Leuven, 3000 Leuven, Belgium., Godderis L; Health and Environment Unit, Faculty of Medicine, KU Leuven, 3000 Leuven, Belgium.; IDEWE, External Service for Prevention and Protection at Work, 3001 Heverlee, Belgium., El Midaoui A; Faculty of Sciences and Techniques, Errachidia, Moulay Ismail University of Meknes, Errachidia 52000, Morocco.; Department of Pharmacology and Physiology, Faculty of Medicine, University of Montreal, Montreal, QC H3C 3J7, Canada., El Jaafari S; Cluster of Competency 'Environment and Health', Faculty of Sciences, Moulay Ismail University, Meknes 50000, Morocco., Zegzouti Filali Y; Cluster of Competency 'Environment and Health', Faculty of Sciences, Moulay Ismail University, Meknes 50000, Morocco.; BASE Laboratory, FSM-FSTE, Moulay Ismail University of Meknes, Meknes 50000, Morocco. |
| Abstrakt: |
This cross-sectional study aimed to develop and validate a vitamin D food frequency questionnaire (VitD-FFQ) to assess vitamin D intake in Moroccan women of reproductive age. Using the method of triads, the VitD-FFQ was validated against seven-day dietary records (7d-FR) and 25-hydroxyvitamin D (25(OH)D) as a biomarker of vitamin D status in 152 women (aged 18-45 years). Participants' sun exposure scores (SES) were assessed using a specific questionnaire (SEQ). Predictors of vitamin D status were identified via linear regression models. Several statistical tests were applied to evaluate the criterion validity of the FFQ against two references methods (7d-FR and the biomarker-serum 25(OH)D). Median (Interquartile range) intakes were 7.10 ± 6.95 µg /day and 6.33 ± 5.02 µg/ day, respectively, for VitD-FFQ and 7d-FR. Vitamin D status was mainly determined by SES (R = 0.47) and vitamin D absolute food intakes derived by the VitD-FFQ (R = 0.56), which demonstrated a more significant prediction ability compared to 7d-FR (R = 0.36). An agreement was observed between the VitD-FFQ and 7d-FR (BA index of 3.29%) with no proportional bias (R 2 = 0.002, p = 0.54). <10% of participants were incorrectly classified, and weighted kappa statistics showed that VitD-FFQ had an acceptable ranking ability compared to the 7d-FR and the biomarker. The validity coefficient for the VitD-FFQ was high: ρQR = 0.90 (95%CI: 0.89-0.92), and a range from 0.46 to 0.90. Adjustment for the participants' SES and BMI (body mass index) improved the biomarker's validity coefficient (ρRB 0.63 (95% CI 0.39-0.82). Our results indicate that the VitD-FFQ is valid for estimating absolute vitamin D intake in Moroccan women of reproductive age. |
