Methods 60 elderly healthy men were divided into three groups, 20 with normal bone density(Group A), 20 with osteopenia(Group B) and 20 with osteoporosis(Group C ),according to broadband ultrasound attenuation(BUA).

• 方法 6 0例健康老年男性按照宽波段超声衰减 (BUA)值分成骨量正常组 (A组 )、骨量减少组 (B组 )和骨质疏松组 (C组 )。