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Nutrients 2017, 9(8), 898; doi:10.3390/nu9080898

Vitamin D Status of Residents in Taiyuan, China and Influencing Factors

1
Shanxi University of Traditional Chinese Medicine, 121, Daxue Street, Higher Education Park, Taiyuan 030619, Shanxi, China
2
Massey Institute of Food Science and Technology, School of Food and Nutrition, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
3
Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan 030001, Shanxi, China
4
Department of Traditional Chinese Medicine, The Second Hospital, Shanxi Medical University, 382, Wuyi Road, Taiyuan 030001, Shanxi, China
5
Department of Hematology, Shanxi Hospital of Traditional Chinese Medicine, 16, Bingzhou West Street, Taiyuan 030012, Shanxi, China
*
Author to whom correspondence should be addressed.
Received: 16 June 2017 / Revised: 17 August 2017 / Accepted: 17 August 2017 / Published: 18 August 2017
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Abstract

High prevalence of vitamin D deficiency has been reported worldwide. Residents of Taiyuan, China, were predicted to be at high risk of vitamin D deficiency due to its high latitude, heavy air pollution, and cultural sun avoidance. This study investigated the vitamin D status of office workers, and explored the potential determinants of capillary 25-hydroxyvitamin D (25(OH)D) concentration as well as the relationship between 25(OH)D and metabolic syndrome. Two hundred participants, aged 20 to 80 years, were recruited. Capillary dried blood spot (DBS) 25(OH)D was measured; together with anthropometric (height, weight, and waist circumference), biochemical (serum lipid profile and fasting glucose) measures and a lifestyle questionnaire. Thirty-four percent of participants had 25(OH)D concentrations below 30 nmol/L, indicating deficient vitamin D status. Women’s 25(OH)D (median; 32.7 nmol/L (upper and lower quartile; 25.8, 43.8)) was significantly lower than men (44.0 nmol/L (32.3, 55.4)) (p < 0.01). Female gender, higher fasting glucose, and increased smoking (p < 0.05) were negatively associated with 25(OH)D concentration. However, there was no association found between metabolic syndrome (MetS) and 25(OH)D concentration and no significant difference in vitamin D status between men or women with MetS compared to healthy individuals. Vitamin D deficiency was common in urban residents of Taiyuan in winter and more so in women than men. View Full-Text
Keywords: Vitamin D deficiency; metabolic syndrome; North China Vitamin D deficiency; metabolic syndrome; North China
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. (CC BY 4.0).

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MDPI and ACS Style

Yan, X.; Thomson, J.S.; Zhao, R.; Zhu, R.; Wang, Z.; Zhang, N.; Coad, J. Vitamin D Status of Residents in Taiyuan, China and Influencing Factors. Nutrients 2017, 9, 898.

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