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Fully sequential monitoring of longitudinal trials using sequential ranks, with applications to an orthodontics study.

机译:使用序贯等级对纵向试验进行完全序贯监测,并应用于正畸研究。

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摘要

This thesis explores the application of fully sequential methods for the analysis of longitudinal clinical trial data. A new nonparametric approach will be developed, using sequential ranks, for the comparison of several treatment groups. Sequential ranking is an alternative to ranking by the usual method. Although sequential ranks are more likely to suffer from information loss than regular ranks, they are preferred here for their independence.;The performance of the three monitoring procedures will be assessed via a Monte Carlo simulation study. In particular, we will compare power and average stopping time for various treatment differences, different numbers of treatment groups, and different response distributions. The procedure will then be applied to data arising from an orthodontic clinical trial.;We will develop three alternative monitoring procedures. The first two will be large-sample, continuous analogues of the Pocock and O'Brien-Fleming group sequential monitoring procedures. The third procedure, a small sample version, will make use of the sign function, and will be grounded in the theory of simple random walks.
机译:本文探讨了全序列方法在纵向临床试验数据分析中的应用。将使用连续等级开发一种新的非参数方法,以比较几个治疗组。顺序排序是通过常规方法进行排序的替代方法。尽管顺序级别比常规级别更容易遭受信息丢失,但由于它们的独立性,它们在这里是首选。;这三种监视程序的性能将通过蒙特卡洛模拟研究进行评估。特别是,我们将比较各种治疗差异,不同治疗组数和不同反应分布的功率和平均停止时间。然后,该程序将应用于正畸临床试验产生的数据。;我们将开发三种替代的监控程序。前两个将是Pocock和O'Brien-Fleming小组顺序监测程序的大样本连续模拟物。第三个过程是一个小样本版本,将使用符号函数,并将基于简单的随机游走理论。

著录项

  • 作者

    Bogowicz, Paul Joseph.;

  • 作者单位

    University of Alberta (Canada).;

  • 授予单位 University of Alberta (Canada).;
  • 学科 Biology Biostatistics.;Statistics.
  • 学位 M.Sc.
  • 年度 2009
  • 页码 116 p.
  • 总页数 116
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 老年病学;
  • 关键词

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