Power Loss of Stratified Log-Rank Test in Homogeneous Samples

Changyong Feng; Hongyue Wang; Xin M. Tu

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Power Loss of Stratified Log-Rank Test in Homogeneous Samples

机译：均匀样本中分层对数秩检验的功率损耗

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We study the loss of power of the stratified log-rank test (SLRT) compared to the unstratified log-rank test (ULRT) in the case of a large number of strata with relatively a small number of stratum sizes in terms of the asymptotic distributions of test statistics under local alternatives. The SLRT tends to lose information due to overstratification. It is better to test the homogeneity among strata before using the stratified log-rank test.

机译：我们研究了分层对数秩检验（SLRT）与非分层对数秩检验（ULRT）相比在渐进分布方面具有相对较小的层数的情况下的功率损失本地替代项下的测试统计信息。由于过度分层，SLRT往往会丢失信息。在使用分层对数秩检验之前，最好测试各层之间的均匀性。

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《International journal of quality, statistics, & reliability》 |2010年第2010期|p.1.1-1.4|共4页
作者
Changyong Feng; Hongyue Wang; Xin M. Tu;
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Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY 14642, USA;

Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY 14642, USA;

Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY 14642, USA;

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1. Power Loss of Stratified Log-Rank Test in Homogeneous Samples [J] . ChangyongFeng, HongyueWang, Xin M.Tu Journal of Quality and Reliability Engineering . 2010,第4期

机译：均匀样本中分层对数秩检验的功率损耗
2. Power and sample size calculation for log-rank test with a time lag in treatment effect. [J] . Zhang D, Quan H Statistics in medicine . 2009,第5期

机译：对数秩检验的功效和样本量计算，但治疗效果存在时滞。
3. Combining stratified and unstratified log-rank tests in paired survival data. [J] . Oakes D, Feng C Statistics in medicine . 2010,第16期

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4. Minimum Test Case for Discrete-type Software Reliability Testing by Stratified Sampling [C] . Qiuying LI, Lei LUO International Conference on Information Technology and Management Innovation . 2013

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5. An investigation of the Type I error rates and power of standard and alternative multivariate tests on *means under homogeneous and heterogeneous covariance matrices and multivariate normality and nonnormality. [D] . Yockey, Ron David. 2000

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6. Power and Sample Size Calculation for Log-rank Test with a Time Lag in Treatment Effect [O] . Daowen Zhang, Hui Quan -1

机译：具有治疗效果时滞的对数秩检验的功效和样本大小计算
7. Power Loss of Stratified Log-Rank Test in Homogeneous Samples [O] . Changyong Feng, Hongyue Wang, Xin M. Tu 2010

机译：在均匀样品中分层对数试验的功率损失
8. Approximate Tests of Independence in Contingency Tables from Complex Stratified Cluster Samples [R] . Nathan, G. 1973

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Power Loss of Stratified Log-Rank Test in Homogeneous Samples

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