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AI 根据所提供的论文材料归类:摘要明确研究随机分配干预的群组试验及干预效应检验。

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关注这篇论文的作者
Thomas M Braun
Ziding Feng

群组随机试验分析的最优置换检验

研究问题
群组随机试验中,组内结局相关且群组数量较少,常规渐近检验可能不可靠;如何保持名义检验水平并提高干预效应检验功效?
方法与思路
作者推导一类置换检验,以残差加权和为统计量,权重依据群组规模与个体结局变异性,并通过模拟及戒烟试验进行比较。
材料陈述的贡献
摘要称,所构造检验在保持名义水平的同时寻求最大功效,模拟展示权重的重要性,并与广义估计方程及惩罚拟似然方法比较。
阅读关注点
应核对随机分配机制与允许的置换、所检验的效应零假设、权重估计方式,以及最优性和检验水平保证的具体范围。
阅读边界
仅据 OpenAlex 索引摘要,稿件版本未注明;精确有效性与最优性的完整条件、试验结果未说明,也未将组内相关等同于干扰效应。

原文摘要

Two facts complicate the comparison of interventions in group randomized trials (GRT's), a family of clinical trials in which each member of a particular group receives the same treatment assignment. First, individual outcomes within each group are often correlated. Second, the number of groups in a GRT is often not sufficient to make asymptotic approximations possible. Therefore, the tests used with methods, such as generalized estimating equations (GEE) and penalized quasi likelihood (PQL), originally developed for longitudinal studies, may not be valid. As an alternative, a class of permutation tests is derived to maximize the power of testing for an intervention effect in a GRT while maintaining a nominal test size. The test uses a statistic that is a weighted sum of residuals, with the weights based on the group sizes and the variability of each individual outcome. Through simulation, we demonstrate the importance of weights to a permutation test's power and compare the power of permutation tests, GEE, and PQL. Last, we apply our methods to an actual GRT to study smoking cessation, discuss the findings based on permutation tests, and compare those findings with traditional methods.

笔记与分组
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