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Journal of Nutrition and Metabolism
Volume 2017 (2017), Article ID 9032141, 8 pages
https://doi.org/10.1155/2017/9032141
Research Article

Hypovitaminosis D and Its Associated Factors in North Algerian Postmenopausal Women: Results of a Cross-Sectional Study

1Centre Hospitalier Universitaire de Douera, Rue des Frères Halim, Douera 16000, Alger, Algeria
2Laboratoire Innotech International, 22 Avenue Aristide Briand, 94110 Arcueil, France
3Sylia-Stat, 10 Boulevard du Maréchal Joffre, 92340 Bourg-la-Reine, France

Correspondence should be addressed to S. Oussedik-Lehtihet; rf.oohay@arimas_tehithel

Received 16 June 2017; Revised 6 October 2017; Accepted 29 October 2017; Published 17 December 2017

Academic Editor: Pedro Moreira

Copyright © 2017 S. Oussedik-Lehtihet et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose. As the vitamin D status of Algerian postmenopausal women was poorly described, this cross-sectional study investigated the prevalence of low vitamin D status in a sample population. Secondarily, predictive factors of this hypovitaminosis D were explored. Methods. All the 336 selected women ≥ 45 years from Douera were interviewed to get anthropometric and lifestyle data, reproductive and medical history, medications, and calcium/vitamin D intakes. A blood sample was collected to measure 25-hydroxyvitamin D (25(OH)D) concentrations. Results. Approximately 86% of subjects had low vitamin D status (<20 ng/mL). Mean 25(OH)D level was 14.4 ± 5.3 ng/mL with a clear seasonal dynamic and a significant negative correlation with PTH levels (r  = −0.15, ). A multiple regression analysis using the 25(OH)D cutoff value of 17 ng/mL instead of the generally admitted level of 20 ng/mL was performed to increase statistical power. Other seasons than summer (OR 4.159 and 95% CI 2.456–7.043), obesity (≥30 kg/m2, OR 1.826, 95% CI 1.081–3.083), and veiling (OR 3.526, 95% CI 1.090–11.400) were significantly associated with 25(OH)D concentrations <17 ng/mL. Conclusions. In North Algeria, the abundant sunlight appears insufficient to fully offset hypovitaminosis D risk factors in postmenopausal women, especially obesity and veiling. It suggests the major need to increase vitamin D supplementation in this subpopulation.