Methods Using RIA to measure the concentration of serum testosterone and using SPA to measure the BMC on 364 healthy old men and 104 younger healthy controls.

• 方法用放免法对364例健康老年男性进行睾酮测定，并用单光子吸收法测定前臂BMC，并用同地区104例健康青年男性作为对照组。