论文部分内容阅读
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 investigate whether the error term of linear regression of urinary iodine level and iodized salt content has spatial autocorrelation. Methods Moran I test, likelihood ratio test, Wald test and Lagrangian test were used to test the spatial correlation of error term. The linear regression and spatial error model were applied to IDD. Results Linear regression error items have spatial autocorrelation. Conclusion The urinary iodine variation of 14 54% was caused by salt iodine and 11 35% was explained by the autocorrelation of spatial error.