目的 :探索正常男性骨密度 ( BMD)变化规律 ,为骨质疏松症 ( OP)的防治提供科学依据。方法 :采用 QCT法测量腰椎和股骨颈 BMD值。结果 :腰椎 L2～ 4 和股骨颈的 BMD最高值均见于 2 0～ 2 9岁组 ,4 0岁以后 BMD随年龄的增长而逐渐下降。各部位骨量累积丢失率随着年龄增长而增加 ,股骨颈骨量累积丢失率高于腰椎。男性腰椎和股骨颈 BMD的总体相关系数 r=0 .66。结论 :腰椎 BMD可以反映股骨颈 BMD,但不能准确评价后者 BMD水平。对于腰椎 BMD正常 ,有骨质疏松临床症状者 ,应参考股骨颈BMD方能作出正确的评价 Objective: To explore the regularity of bone mineral density (BMD) in normal males and provide a scientific basis for the prevention and treatment of osteoporosis (OP). Methods: BMD of lumbar spine and femoral neck were measured by QCT method. Results: The highest BMD of L2 ~ 4 and femoral neck in lumbar spine was found in 20 ~ 29 years old group. BMD gradually decreased with age after 40 years old. All parts of the cumulative loss of bone mass increases with age, the cumulative loss of femoral neck bone mass higher than the lumbar spine. Male lumbar and femoral neck BMD overall correlation coefficient r = 0.66. Conclusion: BMD of lumbar spine can reflect femoral neck BMD, but it can not accurately evaluate the latter BMD level. For lumbar spine BMD normal, clinical symptoms of osteoporosis, should be referred to the femoral neck BMD can make the correct evaluation