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Matched survival data in a co-twin control design

机译:在双胞胎对照设计中匹配生存数据

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摘要

When using the co-twin control design for analysis of event times, one needs a model to address the possible within-pair association. One such model is the shared frailty model in which the random frailty variable creates the desired withinpair association. Standard inference for this model requires independence between the random effect and the covariates. We study how violations of this assumption affect inference for the regression coefficients and conclude that substantial bias may occur. We propose an alternative way of making inference for the regression parameters by using a fixed-effects models for survival in matched pairs. Fitting this model to data generated from the frailty model provides consistent and asymptotically normal estimates of regression coefficients, no matter whether the independence assumption is met.
机译:当使用双胞胎控制设计来分析事件时间时,需要一个模型来解决可能的配对内关联。一种这样的模型是共享脆弱模型,其中随机脆弱变量创建期望的对内关联。此模型的标准推论要求随机效应和协变量之间具有独立性。我们研究了违反此假设的方式如何影响回归系数的推断,并得出结论,可能会出现重大偏差。我们提出了一种替代方法,通过使用固定效应模型对匹配对中的存活进行回归参数推断。将该模型拟合到从脆弱模型生成的数据中,无论是否满足独立性假设,都可以提供一致且渐近的回归系数正常估计。

著录项

  • 来源
    《Lifetime Data Analysis》 |2014年第1期|38-50|共13页
  • 作者单位

    Department of Biostatistics, University of Southern Denmark, Odense, Denmark;

    Department of Epidemiology and the Danish Twin Registry, University of Southern Denmark, Odense, Denmark Danish Aging Research Centre, University of Southern Denmark, Odense, Denmark;

    Department of Biostatistics, University of Copenhagen, Copenhagen, Denmark;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Co-twin control design; Frailty model; Matched pairs; Survival analysis;

    机译:双胞胎控制设计;脆弱的模型;配对对;生存分析;

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