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目的为制定中国老年前期人红细胞压积参考值的统一标准提供科学依据。方法收集了中国各地用温氏法测定的健康老年前期人红细胞压积参考值，并对其与地理因素的关系进行了研究。结果发现海拔高度是影响老年前期人红细胞压积参考值最主要的因素，随着海拔高度的逐渐增大，老年前期人红细胞压积参考值也逐渐增大，相关性很显著。用多元回归分析的方法推导出了二个回归方程。结论如果知道了中国某地的地理因素，就可以用回归方程估算这个地区的老年前期人红细胞压积参考值。依据老年前期人红细胞压积参考值的相似性，若以纬度为主要分区基础，并考虑到其它地理因素和人口分布的影响，把中国分为青藏区、西南区、西北区、东南区、华北区、东北区等六个区
Objective To provide a scientific basis for formulating a uniform standard of reference value of Chinese pre-senile human hematocrit. Methods The reference values of pre-senile human hematocrit, measured by Wen’s method in different parts of China, were collected and their relations with geographical factors were studied. The results showed that altitude was the most important factor influencing the hematocrit reference value of presenile patients. With the gradual increase of altitude, the reference value of pre-senile human hematocrit also increased gradually, and the correlation was significant. Using multiple regression analysis method derived two regression equations. Conclusion If we know the geographical factors in a certain place in China, we can use the regression equation to estimate the reference value of presenile human hematocrit in this area. Based on the similarities of reference values of pre-senile human hematocrit, if we consider latitude as the main regional basis and take into account the influence of other geographical factors and population distribution, China is divided into Qinghai-Tibet, Southwest, Northwest, Southeast, North China District, Northeast District six districts