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タイトル: High frequency of vitamin D deficiency in current pregnant Japanese women associated with UV avoidance and hypo-vitamin D diet
著者: Kanatani, Kumiko T.
Nakayama, Takeo
Adachi, Yuichi
Hamazaki, Kei
Onishi, Kazunari
Konishi, Yukuo
Kawanishi, Yasuyuki
Go, Tohshin
Sato, Keiko
Kurozawa, Youichi
Inadera, Hidekuni
Konishi, Ikuo
Sasaki, Satoshi
Oyama, Hiroshi
著者名の別形: 金谷, 久美子
中山, 健夫
佐藤, 恵子
小西, 郁生
発行日: 4-Mar-2019
出版者: NLM (Medline)
誌名: PLOS ONE
巻: 14
号: 3
論文番号: e0213264
抄録: Background: As a consequence of indoor occupations and reduced exposure to sunlight, concerns have been raised that vitamin D deficiency is widespread in developed countries. Vitamin D is known to be associated with increased risks of morbidity and mortality in various diseases. Objective: To investigate the serum vitamin D status and its relation with life-style factors in pregnant Japanese women. Methods: Among a cohort for 3, 327 pregnant women who participated in an the adjunct study of the Japan Environment and Children's Study during 2011–2013, in which data were obtained on various life-style factors, including both dietary intake of vitamin D and frequency of UV exposure, this study consisted of 1, 592 pregnant women, from whom 2, 030 serum samples were drawn in Jan, Apr, Jul, and Oct, and the association between serum 25(OH)D level and life-style factors were analyzed using linear mixed models. Results: Serum 25(OH)D levels were less than 20ng/mL in 1, 486 of 2, 030 samples (73.2%). There was an obvious seasonal change, with serum 25(OH)D levels of less than 20 ng/mL in 89.8% and 47.8% of samples in spring (April) and autumn (October), respectively. Both the frequency spent under sunlight and dietary intake of vitamin D were significantly associated with serum 25(OH)D level. An increase in sunlight exposure of more than 15 min for 1 to 2 days per week in non-winter, or dietary intake of 2 μg/day of vitamin D resulted in an elevation of 1 ng/mL in serum 25(OH)D levels. Conclusion: These findings indicate that vitamin D deficiency is very severe in Japanese pregnant women, especially those rarely exposed to sunlight. The benefits of UV rays should also be informed of when its risk is alerted, and clinicians should propose the adequate UV exposure level.
著作権等: © 2019 Kanatani et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
URI: http://hdl.handle.net/2433/237306
DOI(出版社版): 10.1371/journal.pone.0213264
PubMed ID: 30830935
出現コレクション:学術雑誌掲載論文等

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