空间误差模型在碘缺乏病资料分析中的应用

Application Spatial Error Models to Iodine Deficiency Disorders

目的 探讨尿碘水平与碘盐含量直线回归的误差项是否具有空间自相关性。方法 利用MoranI检验、似然比检验、Wald检验、拉格朗日检验四种方法检验误差项的空间相关性 ,并将直线回归与空间误差模型应用到碘缺乏病。结果 直线回归的误差项具有空间自相关性。结论 尿碘变异 1 4 51 %由盐碘所引起 ,1 1 35 %由空间误差的自相关性所解释。

Objective To explore whether the error of linear regression has spatial autocorrelation.Methods Applying Moran I test, likelihood ratios test, Wald test and Lagrange multiplicative test to test the spatial autocorrelation about the error of linear regression and spatial error models to iodine deficiency disorders (IDD).Results There are spatial autocorrelation.Conclusion Salt iodine caused 14.51% variation of urine iodine and 12.35% of it was explained by the autocorrelation of spatial error.