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ORIGINAL ARTICLE
Year : 2015  |  Volume : 142  |  Issue : 4  |  Page : 430-437

Relation of serum 25 hydroxyvitamin D levels to bone mineral density in southern Chinese postmenopausal women: A preliminary study


Department of Rehabilitation, General Hospital of Guangzhou Military Command of PLA, Guangzhou, China

Correspondence Address:
Qiu-Shi Wei
Department of Rehabilitation, General Hospital of Guangzhou Military Command of PLA, NO. 111, Liu-Hua Road, Guangzhou 510010
China
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0971-5916.169206

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Background & objectives: Vitamin D insufficiency is prevalent in postmenopausal women and has been related to low bone mineral density (BMD). However, controversial results have been reported for the relationship between serum 25-hydroxyvitamin D [25(OH)D] levels and BMD. This study was done to investigate whether serum 25(OH)D levels were associated with BMD in postmenopausal women living in Guangzhou in southern China. Methods: This cross-sectional study involved 119 asymptomatic postmenopausal women, aged 48-85 yr, who were consecutively selected from Guangzhou city. BMD was measured at the lumbar spine and femoral neck. The correlation between serum 25(OH)D levels and BMD wes investigated. Results: With increasing serum 25(OH)D levels categorized as <20, 20-30, and ≥30ng/ml, the PTH levels decreased gradually ( P=0.031). Bivariate correlation analyses showed an inverse relationship between serum 25(OH)D and PTH levels after controlling for age and BMI (r=-0.209, P=0.023). Although subjects with vitamin D<30 ng/ml had significantly lower BMD, age- and BMI-adjusted serum 25(OH)D was weakly correlated with BMD at femoral neck (r=0.185, P0.045), and not at lumbar spine (r=0.172, p =0 0.063). In multiple regression analyses, serum 25(OH)D was a predictor for BMD at femoral neck (R 2= 0.424). However, serum β-CTX was a determinant for BMD at lumbar spine (R 2= 0.361). Interpretation & conclusions: Serum 25(OH)D levels showed a positive correlation with BMD at femoral neck and serum β-CTX levels were inversely correlated with BMD at lumbar spine in postmenopausal women. Further studies are needed to elucidate the clinical impact of these findings.


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