title: Normal reference value of hemoglobin of infant girls and altitude in China.
abstract: BACKGROUND
  The aim of this study was to supply a scientific basis for uniting the normal reference value standard of hemoglobin of Chinese infant girls.
  
  
  METHODS
  A research study was carried out concerning the relationship between the normal reference value of 3,771 examples of hemoglobin of infant girls and altitude in 40 areas of China. Normal reference values of hemoglobin of infant girls were determined by hemoglobincyanide method.
  
  
  RESULTS
  It was found that correlation of normal reference value of hemoglobin of infant girls and altitude was quite significant (r=0.545). By using method of univariate linear regression analysis, the following regression equation is inferred: Y = 112.9 + 0.008978X +/- 20.8.
  
  
  CONCLUSIONS
  If altitude values are obtained in certain areas, normal reference value of hemoglobin of infant girls of this area can be reckoned by using the regression equation. Furthermore, depending on altitude, China can be divided into three districts as follows: Qingzang District, Central District, and Eastern District.
authors.affiliation: Department of Geography, Shaanxi Normal University, Xi'an, Shaanxi, China. gemiao@yahoo.com.cn
authors.forename: Ge
authors.initials: G
authors.lastname: Miao
mesh_terms: D000531:Altitude; D002681:China; D005260:Female; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D007223:Infant; D012016:Reference Values; D012044:Regression Analysis
chemical_list: D006454:Hemoglobins