1. Higher visceral fat area increases the risk of vitamin D insufficiency and deficiency in Chinese adults.
- Author
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Meilin Zhang, Ping Li, Yufeng Zhu, Hong Chang, Xuan Wang, Weiqiao Liu, Yuwen Zhang, and Guowei Huang
- Subjects
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ADIPOSE tissues , *AGE distribution , *BLOOD pressure , *HUMAN body composition , *CHI-squared test , *CONFIDENCE intervals , *DOSE-response relationship in biochemistry , *OBESITY , *RESEARCH funding , *BODY mass index , *VITAMIN D deficiency , *DISEASE prevalence , *CROSS-sectional method , *DATA analysis software , *DESCRIPTIVE statistics , *ODDS ratio , *MANN Whitney U Test , *ONE-way analysis of variance , *VITAMIN deficiency - Abstract
Background: Visceral fat area (VFA), a novel sex-specific index for visceral fat obesity (VFO) might play a major role in the development of vitamin D deficiency. However, the association between VFA and vitamin D insufficiency and deficiency in Chinese population is less clear. The aim of this study was to explore the population-level association between VFA and vitamin D insufficiency and deficiency among Chinese men and women. Methods: This cross-sectional study involved 1105 adults aged 20-70 years living in Tianjin who were randomly selected and medically examined. All subjects underwent the bioelectrical impedance analysis (BIA) method to estimate the VFA. Serum 25-hydroxyvitamin D3 (25(OH) D3) level was assayed by the high-performance liquid chromatography (HPLC) method and defined insufficiency and deficiency following recommended cutoffs. The association between VFA and vitamin D insufficiency and deficiency was estimated using binary regression analysis. Results: The total prevalence of vitamin D insufficiency (25(OH) D3: 20-29 ug/L) and deficiency (25(OH) D3 < 20 ug/L) were 26.60 % and 24.89 %, respectively. Significant negative association was observed for VFA with serum 25(OH) D3 levels in men and pre-menopausal women (P < 0.05), not in post-menopausal women (P > 0.05). Moreover, increased VFA was observed to be associated with higher vitamin D insufficiency or deficiency risk with a positive dose-response trend (P for trend < 0.001). As compared to individuals with the lowest VFA, those who had the highest VFA were at 4.9-fold risk of vitamin D insufficiency and deficiency [95 % confidence interval (95 % CI): 1.792-13.365] in men and 1.8-fold risk of vitamin D insufficiency and deficiency (95 % CI: 1.051-3.210) in pre-menopausal women, but not in post-menopausal women [odds ratio (OR) (95 % CI): 2.326(0.903-5.991)]. Conclusions: These results suggest that higher VFA increases the risk of vitamin D insufficiency and deficiency in men and pre-menopausal women, but not in post-menopausal women. VFA is a better and convenience surrogate marker for visceral adipose measurement and could be used in identifying the risk of vitamin D insufficiency and deficiency in routine health examination. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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