中文摘要：

目的通过探讨男性左心房内径与地理环境的关系,拟定46～80岁男性左心房内径参考值的标准。方法收集了全国205个单位8 226例健康46～80岁男性左心房内径参考值资料,运用相关分析法分析左心房内径参考值与地理环境之间的相关性,多元线性回归和因子分析两种方法分别建立模型,然后通过T检验选取最优模型,得出其与地理环境的关系。结果左心房内径参考值与地理环境之间有很显著的相关性,用因子分析的方法比较出一个最优的回归方程：=28.07-0.000 087 72X1-0.000 060 27X2＋0.000 844 9X3＋0.011 99X4＋0.000 129 5X5＋0.027 21X6＋0.495X7±2.88。Y是46～80岁男性左心房内径参考值（mm）,X1是海拔高度（m）、X2是年日照时数（h）、X3是年平均气温（℃）,X4是年平均相对湿度（%）、X5是年降水量（mm）、X6是气温年较差（℃）、X7是年平均风速（m/s）,2.88是剩余标准差。并通过克里格（Kriging）插值法精确地内插出中国46～80岁男性左心房内径参考值的地理分布图。结论如果想要获得某地的46～80岁男性左心房内径参考值,可以通过方程计算得出结果,从地理分布图也可得到中国任何地方46～80岁男性左心房内径的参考值。

英文摘要：

Objective To reveal the geographical distributing rule and supply a scientific basis for unifying the reference value standard of left atrial diameter（LAD） of Chinese 46～80 years old men in various regions of China.Methods The LAD reference values were collected from 8 226 healthy old men aged 46～80 years in 205 areas of China.The correlation between the measured LAD values and the geographical environment was analyzed by regression analysis and factor analysis;and by T-test,one best regression equation was inferred.Results The reference value of LAD was correlated with the geographical environment.The linear regression equation deduced from factor analysis was：=28.07-0.000 087 72X1-0.000 060 27X2＋0.000 844 9X3＋0.011 99X4＋0.000 129 5X5＋0.027 21X6＋0.495X7±2.88.In the above equation, was normal reference value of Chinese 46～80 years old men＇ LAD（mm）,X1 was altitude（m）,X2 was annual sunshine duration（h）,X3 was annual average temperature（℃）,X4 was annual mean relative humidity（%）,X5 was annual precipitation amount（mm）,X6 was annual range of air temperature（℃）,X7 was annual average wind speed（m/s）,2.88 was the value of residual standard deviations.The geography distribution figure of Chinese 46～80 years old men LAD reference values was exactly inserted with the method of Kriging.Conclusions If geographical environment of a particular area is obtained,LAD reference value of Chinese 46～80 years old men in this area can be calculated using this model and normal LAD reference values of Chinese 46～80 years old men anywhere in China can be obtained from geography distribution figure.