Serum 25-Hydroxyvitamin D Concentrations and Season-Specific Correlates in Japanese Adults

Akiko, Nanri and Leng, Huat Foo and Kazutosh, Nakamura and Ai, Hori and Kalpana, Poudel-Tandukar and Yumi, Matsushita and Tetsuya, Mizoue (2011) Serum 25-Hydroxyvitamin D Concentrations and Season-Specific Correlates in Japanese Adults. Journal of Epidemiology, 21 (5). pp. 346-353. ISSN 0917-5040

[img]
Preview
PDF
Download (541Kb) | Preview

    Abstract

    Background: Several lines of evidence indicate an important role for vitamin D in the prevention of a range of diseases. Blood vitamin D levels show clear seasonal variation; however, data on the determinants of vitamin D status for each season are limited. We investigated the association between lifestyle and serum vitamin D concentration by season in Japanese workers. Methods: Subjects were 312 men and 217 women aged 21 to 67 years who worked in municipal offices in Northern Kyushu, Japan and participated in a periodic checkup in July or November. Multiple linear regression analysis was used to examine the association between serum 25-hydroxivitamin D concentrations and lifestyle factors for each season. Results: Mean serum 25-hydroxyvitamin D concentration was 27.4 ng/ml (68.4 nmol/L) and 21.4 ng/ml (53.4 nmol/L) for workers surveyed in July and November, respectively (P < 0.001); the prevalence of vitamin D deficiency (<20 ng/ml) was 9.3% and 46.7%, respectively (P < 0.001). In November, dietary vitamin D intake (in both sexes) and nonsmoking and physical activity (in men) were significantly associated with higher concentrations of serum 25-hydroxyvitamin D. In summer, fish/shellfish intake was associated with higher serum 25- hydroxyvitamin D concentrations in women. Conclusions: Vitamin D deficiency is common in Japanese workers during seasons with limited sunlight. The lifestyle correlates of favorable vitamin D status in November were physical activity, dietary vitamin D intake, and nonsmoking.

    Item Type: Article
    Subjects: R Medicine > R Medicine (General) > R5-130.5 General works
    Divisions: Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Kesihatan (School of Health Sciences) > Article
    Depositing User: Mr Noorazilan Noordin
    Date Deposited: 16 Aug 2017 12:44
    Last Modified: 16 Aug 2017 12:44
    URI: http://eprints.usm.my/id/eprint/36128

    Actions (login required)

    View Item
    Share