Rank-based principal stratum sensitivity analyses.
Rank-based principal stratum sensitivity analyses.
复制标题
基于等级的主要阶层敏感性分析。
DOI:
10.1002/sim.5849
复制
发表时间:
2013
影响因子:
2
通讯作者:
Shepherd,BE
中科院分区:
文献类型:
--
作者:
Lu,X;Mehrotra,DV;Shepherd,BE
We describe rank‐based approaches to assess principal stratification treatment effects in studies where the outcome of interest is only well‐defined in a subgroup selected after randomization. Our methods are sensitivity analyses, in that estimands are identified by fixing a parameter and then we investigate the sensitivity of results by varying this parameter over a range of plausible values. We present three rank‐based test statistics and compare their performance through simulations, and provide recommendations. We also study three different bootstrap approaches for determining levels of significance. Finally, we apply our methods to two studies: an HIV vaccine trial and a prostate cancer prevention trial. Copyright © 2013 John Wiley & Sons, Ltd.