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arXiv 0708.0519math.STstat.TH
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多变量失效时间数据的变系数风险模型

Hazard models with varying coefficients for multivariate failure time data

Jianwen Cai, Jianqing Fan, Haibo Zhou, Yong Zhou

摘要:

多变量失效时间数据的变系数边际风险模型的统计估计和推断是生存分析中的重要课题。提出了一种局部伪偏似然估计方法。为了提高估计器的效率,本文还提出了一种加权平均估计器。建立了估计量的相合性和渐近正态性,推导了估计系数的标准误差公式,并进行了经验检验。为了减少最大局部伪偏似然估计的计算量,提出了一种简单实用的一步估计方法。建立了一步估计的统计性质,并进行了模拟研究,比较性能的一步估计的最大局部伪偏似然估计。结果表明,一步估计可以在不影响性能的前提下节省计算量,且最优加权平均估计比最大局部伪偏似然估计更有效.从Busselton人口健康调查的数据集进行分析,以说明我们提出的方法。

英文摘要:

Statistical estimation and inference for marginal hazard models with varying coefficients for multivariate failure time data are important subjects in survival analysis. A local pseudo-partial likelihood procedure is proposed for estimating the unknown coefficient functions. A weighted average estimator is also proposed in an attempt to improve the efficiency of the estimator. The consistency and asymptotic normality of the proposed estimators are established and standard error formulas for the estimated coefficients are derived and empirically tested. To reduce the computational burden of the maximum local pseudo-partial likelihood estimator, a simple and useful one-step estimator is proposed. Statistical properties of the one-step estimator are established and simulation studies are conducted to compare the performance of the one-step estimator to that of the maximum local pseudo-partial likelihood estimator. The results show that the one-step estimator can save computational cost without compromising performance both asymptotically and empirically and that an optimal weighted average estimator is more efficient than the maximum local pseudo-partial likelihood estimator. A data set from the Busselton Population Health Surveys is analyzed to illustrate our proposed methodology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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