The relationship between reference value of old people's erythrocyte sedimentation rate and altitude

In order to provide a scientific basic for a unified standard of the refere nce value of old people's erythrocyte sedimentation rate (ESR) in China. Th e reference value of healthy old people's ESR was collected according to th e Wintrobe method, the relationship between the reference value of old peop le's ESR and altitude was tested in this paper. It was found that the refer ence value of old people's ESR decreases when the altitude gradually increa ses, the relationship is quite significant. The method of mathematical univ ariate regression analysis was used to deduce two regression equations: (Y) over cap (1) = 16.38 - 0.00301X +/-6.53, (Y) over cap (2) = 25.92 - 0.0043 8X +/- 10.25. If the altitude value of a particular area of China is known, the reference value of old people's ESR can be calculated by means of the regression equations. Furthermore, depending on the altitude, China can be divided into three districts: Qingzang Districts, Central Districts and Eas tern Districts.