Modelling survival events with longitudinal data measured with error

Hongsheng Dai, Jianxin Pan, Yanchun Bao

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    Abstract

    In survival analysis, time-dependent covariates are usually present as longitudinal data collected periodically and measured with error. The longitudinal data can be assumed to follow a linear mixed effect model and Cox regression models may be used for modelling of survival events. The hazard rate of survival times depends on the underlying time-dependent covariate measured with error, which may be described by random effects. Most existing methods proposed for such models assume a parametric distribution assumption on the random effects and specify a normally distributed error term for the linear mixed effect model. These assumptions may not be always valid in practice. In this paper we propose a new likelihood method for Cox regression models with error-contaminated time-dependent covariates. The proposed method does not require any parametric distribution assumption on random effects and random errors. Asymptotic properties for parameter estimators are provided. Simulation results show that under certain situations the proposed methods are more efficient than the existing methods.
    Original languageEnglish
    JournalCommunications in Statistics: Theory and Methods
    Publication statusPublished - 2013

    Keywords

    • Longitudinal measurements; Partial likelihood; Linear mixed model; Random effects; Proportional hazard model

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