腰椎各椎体骨密度的分析

目的分析腰椎各椎体骨密度（ＢＭＤ）的差异。方法对１２１４例在我科进行骨密度检查的２０～８９岁人群，男性３９０例，女性８２４例，除外各种器质性内分泌、消化系统及肿瘤等疾病，用双能Ｘ线骨密度仪（ＤＥＸＡ）测量腰椎ＢＭＤ，通过计算机分析比较各椎体ＢＭＤ值的差异与相互关系，用ＥＸＣＥＬ软件做统计学分析，计数资料进行配对ｔ检验。结果ＢＭＤ值以Ｌ１最低，Ｌ４最高，Ｌ１－２与Ｌ２－４ＢＭＤ女性在４０岁以上有显著差异（Ｐ＜０．００１），男性在６０岁以上（Ｐ＜０．０５），８０岁以后无明显差异，女性５０岁以后骨丢失明显快于男性。结论腰椎各椎体ＢＭＤ存在差异，尤以女性明显，其差异与增龄造成的腰椎退行性变的干扰有关

Analysis of bone mineral density in vertebral bodies of lumbar spine

Objective Analysing the difference of bone mineral density (BMD) in every vertebra of lumbar spine. Method The BMD in every vertebra of lumbar spine was investigated by doulble energy X ray absorptiometry (DEXA) in 1214 subjects aged 20-89(390 males,824 females),using DPL (Lunar Co.USA) and EXCEL software for analysis. Results The BMD was lowest in lumbar spine 1 (L 1) and highest in lumbar spine 4 (L 4).There was significant difference in BMD between different vertebrae (L 1-2 ,L 2-4 ) after the age of 40 for the females ( P <0.001) and after the age of 60 for the males ( P <0 05),but not for both sexes after the age of 80. Conclusion Difference in BMD exists between vertebrae of lumbar spine,especialy for the females,which is attributed to the degenaration of lumbar spine due to ageing.