骨质疏松症，是骨矿物质密度减少，发生在55%的美国50岁以上的人身上。
Osteoporosis, the loss of bone mineral density, occurs in 55% of Americans over the age of 50.
在两组中，总体的骨矿物质密度、平衡能力和灵活性没有明显的提高。
Total bone mineral density, balance, and flexibility did not improve significantly in either group.
唑来膦酸注射也伴随着骨矿物质密度和骨新陈代谢标志物的显著改善。
Zoledronic acid was also associated with a significant improvement in bone mineral density and bone metabolism markers.
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