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目的了解老年人胫骨骨强度的变化。方法用骨定量超声仪（ＱＵＳ）测量１５５例老年人和３８５例青年人胫骨超声速度（ＳＯＳ），女性同时用双能Ｘ线骨密度仪（ＤＥＸＡ）测左前臂中、远端１／３交界处骨矿密度（ＢＭＤ）。结果两组（６０～６９岁组和≥７０岁组）老年人ＳＯＳ，女性分别为３７６８±１２１和３７４８±１３２ｍｓ－１，男性分别为３９０６±１２３和３９２５±６６ｍｓ－１。老年人ＳＯＳ显著低于青年人（Ｐ＜０．００１），女性分别低５．２％±３．０％和５．７％±３．３％，男性分别低１．８％±３．１％和１．３％±１．７％，男女差异有显著性（Ｐ＜０．００１）。两组老年人骨质疏松症（ＯＰ）检出率女性分别为４６．５％和６１．１％，男性分别为１１．４％和９．１％，女性显著高于男性（Ｐ＜０．００１）。ＱＵＳ与ＤＥＸＡ的相关系数（ｒ）为０．６５７（Ｐ＜０．００１），ＯＰ检出率分别为４９．４％和５５．１％，诊断符合率为６０．０％。结论老年人胫骨ＳＯＳ明显下降，老年女性ＳＯＳ明显低于老年男性。
Objective To understand the changes of tibia bone strength in the elderly. Methods The tibial ultrasonic velocity (SOS) of 155 elderly people and 385 young people was measured by bone quantitative ultrasound (QUS). At the same time, women also measured the middle and distal 1/3 junction of the left forearm with dual energy X-ray absorptiometry (DEXA) Department of bone mineral density (BMD). Results The SOS and females in the two groups (aged 60-69 and ≥70 years old) were 3768 ± 121 and 3748 ± 132ms-1, respectively, and were 3906 ± 123 and 3925 ± 66ms-1 for males respectively. The SOS of the elderly was significantly lower than that of the young (P <0.001), with women being 5.2% ± 3.0% and 5.7% ± 3.3% respectively, while males were 1.8% ± 3.1% % And 1.3% ± 1.7%, the difference between men and women was significant (P <0.001). The prevalence of osteoporosis (OP) in the two groups was 46.5% and 61.1% respectively in women and 11.4% and 9.1% respectively in males and females was significantly higher than that in males (P <0. 001). The correlation coefficient (r) between QUS and DEXA was 0.657 (P <0.001). The detection rates of OP and OPA were 49.4% and 55.1%, respectively. The diagnostic coincidence rate was 60.0%. Conclusion The SOS of the tibia in the elderly is obviously decreased, while the SOS in the elderly is significantly lower than that in the elderly.