Lu, Ling, Yu, Zhijie, Pan, An, Hu, Frank B., Franco, Oscar H., Li, Huaixing, Li, Xiaoying, Yang, Xilin, Chen, Yan and Lin, Xu. (2009) Plasma 25-hydroxyvitamin D concentration and metabolic syndrome among middle-aged and elderly chinese individuals. Diabetes Care, Vol.32 (No.7). pp. 1278-1283. ISSN 0149-5992

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Abstract

OBJECTIVE - To evaluate the association between 25-hydroxyvitamin D [25(OH)D] and metabolic syndrome in the Chinese population. RESEARCH DESIGN AND METHODS - Plasma 25(OH)D was measured in a cross sectional sample of 1,443 men and 1,819 women aged 50-70 years from Beijing and Shanghai. Metabolic syndrome was defined according to the updated National Cholesterol Education Program Adult Treatment Panel III criteria for Asian Americans. Fasting plasma glucose, insulin, lipid profile, A1C, and inflammatory markers were measured. RESULTS - The geometric mean of plasma 25(OH)D was 40.4 nmol/l, and percentages of vitamin D deficiency [25(OH)D <50 nmol/l] and insufficiency [50 <= 25(OH)D <75 nmol/l] were 69.2 and 24.4%, respectively. Compared with the highest 25(OH)D quintile (>= 57.7 nmol/l), the odds ratio for metabolic syndrome in the lowest quintile (<= 28.7 nmol/l) was 1.52 (95% CI 1.17-1.98, P-trend = 0.0002) after multiple adjustment. Significant inverse associations also existed between 25(OH)D and individual metabolic syndrome components plus A1C. Moreover, we observed significant inverse associations of 25(OH)D with Fasting insulin and the insulin resistance index (homeostasis model assessment of insulin resistance [HOMA-IR]) in overweight and obese individuals (BMI >= 24 kg/m(2)) but not in their normal-weight counterparts (test for interaction: P = 0.0363 and 0.0187 for insulin and HOMA-IR, respectively). CONCLUSIONS - Vitamin D deficiency is common in the middle-aged and elderly Chinese population, and a low 25(OH)D level is significantly associated with an increased risk of having metabolic syndrome and insulin resistance. Prospective studies and randomized clinical trials are warranted to determine the role of 25(OH)D in the development of metabolic syndrome and related metabolic diseases.

Item Type:	Journal Article
Subjects:	R Medicine > RC Internal medicine
Divisions:	Faculty of Medicine > Warwick Medical School > Health Sciences Faculty of Medicine > Warwick Medical School
Journal or Publication Title:	Diabetes Care
Publisher:	American Diabetes Association
ISSN:	0149-5992
Date:	July 2009
Volume:	Vol.32
Number:	No.7
Number of Pages:	6
Page Range:	pp. 1278-1283
Identification Number:	10.2337/dc09-0209
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Chinese Academy of Sciences, Ministry of Science and Technology of China, Shanghai-Unilever Research Development Fund
Grant number:	SIBS2008006, KSCXI-YW-02, KSCX2-YWR-73, KSCX2-YW-R-116, 2006CB503902, CH-2006-0941
URI:	http://wrap.warwick.ac.uk/id/eprint/27651

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