Methods Chinese healthy adult and old peoples hematocrit value were determined by the way of wintrobe laws and their relationship with five geographical factors were observed.

• 方法收集了中国各地用温氏法测定的健康中老年人红细胞压积,并对其与地理因素的关系进行了研究，用逐步回归分析的方法推导出了2个回归方程。