27通常当人们衰老的时候，他们的骨质减少，使他们容易骨折。

27typically, as people age, their bone mass decreases, making them more vulnerable to bone fractures.

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背景：研究显示27%到38%的青少年特发性脊柱侧凸女孩存在全身骨质减少。

Background: Studies have shown that 27% to 38% of girls with adolescent idiopathic scoliosis have systemic osteopenia.

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结果根据世界卫生组织的标准，在腰椎位点3 9%患者BMD正常，46%患者骨质减少，15 %患者骨质疏松；

Results According to the WHO criteria, 39% patients with SLE had normal BMD, 46% had osteopenia and 15% had osteoporosis at the lumbar spine;

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