title: Technical note: reference values of haematocrit in young people and relationship with altitude.
abstract: The purpose of this paper is to provide scientific basis for a unified standard reference value of haematocrit in young people in China. The reference values of haematocrit levels in healthy young people have been collected according to the Wintrobe methods; the relationship between the reference values of haematocrit in young people and altitude has been tested in this paper. It has been found that the reference value of haematocrit in young people increases when the altitude gradually increases, and such relationship is quite significant, The method of mathematical univariate regression analysis is used to deduce two regression equations: Y1 = 44.3 + 0.00357X +/- 3.7, and Y2 = 39.7+0.00318X +/- 2.6. If the altitude value of a s known, the particular area of China is known, the reference value of haematocrit in young people there can be calculated by means of the regression equations. Furhermore depending on the altitude, China can be divided into three districts: Qingzang District, Central District and Eastern District.
authors.affiliation: Department of Geography, Shanxi Normal University, Xi'an, PR China. gemiao@snnu.edu.cn
authors.forename: M
authors.initials: M
authors.lastname: Ge
authors.forename: Z
authors.initials: Z
authors.lastname: Ren
authors.forename: Q
authors.initials: Q
authors.lastname: Yang
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: S
authors.initials: S
authors.lastname: Yin
authors.forename: W
authors.initials: W
authors.lastname: Yang
mesh_terms: D000293:Adolescent; D000328:Adult; D000531:Altitude; D002681:China; D005260:Female; D006400:Hematocrit / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D012016:Reference Values; D012044:Regression Analysis