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  • Title: Prevalence of vitamin D deficiency and its association with nutrition, travelling and clothing habits in an immigrant population in Northern Sweden.
    Author: Granlund L, Ramnemark A, Andersson C, Lindkvist M, Fhärm E, Norberg M.
    Journal: Eur J Clin Nutr; 2016 Mar; 70(3):373-9. PubMed ID: 26508457.
    Abstract:
    OBJECTIVES: To study prevalence and determinants of vitamin D deficiency in immigrants from Africa and the Middle East living in Umeå, Sweden. DESIGN: Cross-sectional population based. SETTING: Umeå, Sweden (63° N). SUBJECTS/METHODS: Immigrants aged 25-65 years from nine countries in Africa or the Middle East (n=1306) were invited. A total of 111 men and 106 women (16.5%) completed the study. S-25-hydroxyvitamin D3 was measured with HPLC. Anthropometry, medical, socioeconomic and lifestyle data were registered. RESULTS: Vitamin D status was insufficient or deficient in 73% of the participants. Specifically, 12% had vitamin D deficiency (25(OH)D3<25 nmol/l), and only 3.7% had optimal vitamin D status (25(OH)D3 75-125 nmol/l). Mean 25(OH)D3 level was 41.0 nmol/l (± 16.6) with no difference between sexes. Levels of 25(OH)D3 were lower (P=0.030) and vitamin D deficiency was twice as common in immigrants from Africa compared with those from the Middle East. In the multiple regression analysis, vitamin D deficiency was significantly associated with low fatty fish intake (OR 4.31, 95% CI 1.61-11.55), not travelling abroad (OR 3.76, 95% CI 1.18-11.96) and wearing long-sleeved clothes in summer (OR 3.15, 95% CI 1.09-9.12). CONCLUSIONS: The majority of immigrants from Africa and the Middle East who live in northern Sweden have vitamin D deficiency or insufficiency. Our results are consistent with sun exposure and a diet with high intake of fatty fish being most important in avoiding vitamin D deficiency.
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