随机效应模型(random effects models)是经典的线性模型的一种推广，就是把原来（固定）的回归系数看作是随机变量，一般都是假设是来自正态分布。
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random and fixed effects models 追踪资料模型 ; 估计量
nonlinear models with random effects 非线性随机效应模型
Pooled effect sizes were calculated using random effects models.
利用随机效应模型计算了混合效应的大小。
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Fixed and random effects models were used to pool the data.
使用固定与随机效果模型整合资料。
Pooled relative risks (RRs) were estimated by random effects models.
混合相对危险度(RRs)通过随机效果模型进行估测。
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