固定效应模型与混合效应模型在测量误差估计中的应用

探讨疾病危险因素暴露剂量的测量误差评价方式,以云南锡业公司所属锡矿井下作业环境有害物质监测资料为例,分别进行固定效应和混合效应的方差成分模型拟合,估计该资料的测量误差大小.固定效应的方差分析结果显示氡、氡子体和粉尘的测量信度均接近1,混合效应模型也显示资料的测量质量较佳(信度系数估计值均>0.8).提示固定效应模型和混合效应模型均可应用于测量质量的评价,应根据资料的特性选择正确的统计模型,以得到较为准确的测量误差估计值.

The Application of Fix-effect and Mixed-effect Models to the Mesurement Error Estimation

To investigate on statistical methods for the assessment of ex-posure measurement erorr. Concentratoins of radon, radon daugh-ters and dust in underground mines measured by the Labor Protec-tion Institute of Yunnan Tin Cooperation as an example, a fixed-effect model and a mixed-effect model were fitted to calculated thereliability coeffcients. All of the estimated reliability coefficientswere close to 1, which showed that the data were under well con-trolled. It indicats that both fixed-effect and mixed-effct modelscould work as useful methods for the assessment of measurementerror, if applying with caution.