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Vitamine D totale, vitamine D libre et paramètres osseux chez des jeunes adultes Libanais

Abstract : The aims of this study were to evaluate the levels of 25(OH)D in a group of young Lebanese adults and to explore the relations between 25(OH)D, free vitamin D and many bone parameters in the same population. First, we have demonstrated that vitamin D insufficiency is very frequent in young Lebanese adults (66% in women vs. 50.7 % in men) and that levels of 25(OH)D are not positive determinants of BMD. Second, we have shown that 25(OH)D was positively correlated to BSI and CSI in both sexes, and some of these correlations remained significant after adjustment for BMI. Third, we have demonstrated that 25(OH)D levels were positively correlated to TBS in both sexes and that TBS values were higher in vitamin D sufficient (> 30 ng/ml) subjects compared to vitamin D insufficient subjects (< 30 ng/ml). Finally, free vitamin D was positively correlated to many bone parameters in both sexes; some of these correlations remained significant after adjustment for body weight. In conclusion, 25(OH)D is a positive determinant of many bone parameters in young Lebanese adults. Moreover, free vitamin D seems to be a positive determinant of many bone parameters in this population. The measurement of both forms of vitamin D (25(OH)D and total vitamin D) is interesting for the evaluation and the prevention of osteoporosis.
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Abir Alwan. Vitamine D totale, vitamine D libre et paramètres osseux chez des jeunes adultes Libanais. Education. Université Rennes 2, 2018. Français. ⟨NNT : 2018REN20027⟩. ⟨tel-01956590v2⟩

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