The effect of surgery and illness on longitudinal cognitive course was analyzed using a general linear mixed effects model.

采用一般的线性混合效应模型研究手术和疾病前后对纵向认知曲线的影响。

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According the characteristics of the bivariate repeated measurement data, using the MIXED procedure of SAS software to fit linear mixed effects model.

目的：通过混合效应线性模型与单因素方差分析在重复测量资料中的应用比较，旨在说明两方法在处理重复测量资料时的应用特点。

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Method: Make use of mixed effects linear model and single effect analysis of variance to deal with the repeated measure data.

方法：用混合效应线性模型和单因素方差分析处理重复测量资料并比较。

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