A simulation study on power comparisons for group sequential tests of non-parametric statistics

摘要: In this article, a group sequential test (GST) of non-parametric statistics for survival data is briefly reviewed. An asymptotic joint distribution the statistics, obtained after each interim analysis, given to illustrate applicability critical values GST procedures. It should be noted that censored observations are generally seen in data. Therefore, if one makes power calculations irrespective censoring, reliable results may not achieved, due lack information about censoring structure. A wide simulation study, covering different rates and tied observations, conducted make comparisons under various scenarios. The interpreted compared with by using analysis sample size (PASS) software.