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arXiv 2302.05977stat.ME
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重新随机化试验的重复次数

Number of Repetitions in Re-randomization Tests

Yilong Zhang, Yujie Zhao, Yiwen Luo

摘要:

在协变量自适应或反应自适应随机化中,治疗分配和结局可能相关。在这种情况下,重新随机化检验是提供有效统计推断的一种简单而有吸引力的方法。在本文中,我们研究的重复数在重新随机化测试。这是由临床试验中的成组序贯设计激发的,其中在中期分析时名义显著性界限可能非常小。因此,重新随机化测试导致非常大量的所需重复,这在计算上可能是难以处理的。为了减少重复的次数,我们提出了一个自适应的过程,并比较它与多个方法在预定义的标准。进行了蒙特卡罗模拟,以显示在有限的样本量的不同方法的性能。我们还提出了减少总计算时间的策略,并在中期分析数据揭盲前后的准备、执行和报告方面提供了实用指导,以便在合理的时间范围内完成计算。

英文摘要:

In covariate-adaptive or response-adaptive randomization, the treatment assignment and outcome can be correlated. Under this situation, re-randomization tests are a straightforward and attractive method to provide valid statistical inference. In this paper, we investigate the number of repetitions in the re-randomization tests. This is motivated by the group sequential design in clinical trials, where the nominal significance bound can be very small at an interim analysis. Accordingly, re-randomization tests lead to a very large number of required repetitions, which may be computationally intractable. To reduce the number of repetitions, we propose an adaptive procedure and compare it with multiple approaches under pre-defined criteria. Monte Carlo simulations are conducted to show the performance of different approaches in a limited sample size. We also suggest strategies to reduce total computation time and provide practical guidance in preparing, executing and reporting before and after data are unblinded at an interim analysis, so one can complete the computation within a reasonable time frame.

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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