Association of homocysteine, vitamin B12, and folate with bone mineral density in postmenopausal women: a meta-analysis

Zhang, Hongxiu; Tao, Xincheng; Wu, Jie
May 2014
Archives of Gynecology & Obstetrics;May2014, Vol. 289 Issue 5, p1003
Academic Journal
Background: The relationship of homocysteine (Hcy), folate, and vitamin B12 with bone mineral density (BMD) has been investigated in postmenopausal women. However, the relationship is still controversial. Purpose: To evaluate the association of Hcy, folate, vitamin B12 and BMD in postmenopausal women with a meta-analysis. Methods: We searched for all published articles indexed in Medline (1950-2012), Embase (1974-2012), and China National Knowledge Infrastructure (1994-2012). Any case-control or cohort study relating to Hcy, vitamin B12, folate, and BMD was included, and the data were extracted independently by two reviewers. Criteria for inclusion were the assessment of Hcy, vitamin B12, folate, and BMD in postmenopausal women as outcomes. We performed this meta-analysis with Review Manager 5.1 software. Odds ratios and 95 % confidence intervals (CI) were used to evaluate the results. Results: Six eligible studies were selected for meta-analysis. Our analysis suggested that vitamin B12 and Hcy levels were significantly higher in postmenopausal osteoporosis (PMOP) group than that in controls ( P = 0.007, <0.05; 95 % CI 3.06-19.38 and P = 0.0003, <0.05; 95 % CI 0.75-2.52, respectively). Folate level was lower in PMOP group than that in controls, but this difference was not statistically significant ( P = 0.09, 95 % CI −3.33 to 0.25). Conclusions: Hcy and vitamin B12, but not folate, were related to BMD in PMOP. Extra vitamin B12 may not play a protective role for osteoporosis in postmenopausal women. Future studies are needed to confirm them, especially the relationship between increased vitamin B12 and BMD.


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