METHODS By XR 36 dual energy X ray absorptiometry (DEXA) and other methods, the length,diameter, surface area, weight, bone mineral density and mineral content of femur and tibia were measured.

• 方法 采用 XR- 36双能 X射线骨密度测定等方法检测骨长、骨直径、骨面积和骨质量 ；以及骨矿含量等指标 .