[Relationship between reference value (Wintrobe) of Chinese healthy female hematocrit and geographical factors]

To provide a basis for uniting the reference value standard (Wintrobe) of Chinese healthy female hematocrit, a study has been made on the relationship between the reference value of 22135 cases of Chinese female hematocrit and five geographical factors in China's 436 areas, which were determined by the method of Wintrobe. It is found that altitude is the main factor affecting the reference value (Wintrobe) of Chinese healthy female hematocrit. As the altitude increases gradually, the reference value (Wintrobe) of Chinese healthy female hematocrit also increases. For applying the method of mathematical regression analysis, a multivariate regression equation is formulated. In case geographical index values are obtained in an area, the reference value (Wintrobe) of Chinese healthy female heamtocrit for this area can be reckoned using the regression equation. Furthermore, according to the similarity of the reference values (Wintrobe) of Chinese healthy female hematocrit, China can be divided into six regions: Qinghai-Xizang region, southwest region, northwest region, southeast region, north region and northeast region.