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Densitometry trends in postmenopausal Asian women undergoing bisphosphonate treatment

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Singapore Med J 2011; 52(9): 677-680
Densitometry trends in postmenopausal Asian women undergoing bisphosphonate treatment

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Ang CL, Singh G, Goh ASW, Shen L, Tay BK
Correspondence: Dr Ang Chia Liang, med80199@yahoo.com

ABSTRACT
Introduction
Bisphosphonates have been shown to be effective in reducing the risk of fragility fractures in several landmark clinical trials conducted in Western populations. However, limited studies on bone mineral densitometry (BMD) trends have been conducted in Asian women. We conducted a retrospective review of electronic records to determine the actual BMD trends in a local population of postmenopausal women on bisphosphonate treatment.
Methods The electronic records of all women over 50 years of age who had undergone BMD at Singapore General Hospital in 2004 were examined. Patients who were later started on bisphosphonates and continued the treatment for at least two years were selected for the study. Their subsequent BMD results were recorded, and longitudinal analysis was applied to determine the BMD trends as a cohort.
Results A total of 254 postmenopausal women were included for analysis. Their mean BMD T-score was -2.70 before treatment, and improved to -2.56 and -2.27 one and two years after treatment, respectively. However, the score deteriorated to -2.50 and -2.62 three and four years after treatment, respectively. The difference between each year’s results and those of the baseline was statistically significant.
Conclusion In our study, the BMD scores in our local population showed improvement in the first two years of bisphosphonate treatment but declined subsequently. Our findings contrasted with those of studies conducted in Western populations. Further prospective studies are suggested so as to elucidate the actual BMD trends and fracture risk reduction in Asian women on bisphosphonate treatment.

Keywords: Asian, bisphosphonates, bone mineral density, postmenopausal, women
Singapore Med J 2011; 52(9): 677–680

http://smj.org.sg/sites/default/files/5209/5209a5.pdf
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