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arXiv 2007.01680stat.ME
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开发用于两个试验终点的预测签名:基于交叉验证风险评分方法

Developing a predictive signature for two trial endpoints using the cross-validated risk scores method

Svetlana Cherlin, James M. S. Wason

AI总结:

本研究扩展交叉验证风险评分方法至双结果场景(CVRS2),通过模拟和真实试验验证其能可靠识别敏感组,并同时显著改善两个终点,优于传统CVRS方法。

摘要:

现有的交叉验证风险评分(CVRS)设计已被提出用于利用高维数据(如遗传数据)开发并测试高疗效患者组(敏感组)中治疗的有效性。该设计基于为每位患者计算风险评分,并通过非参数聚类程序将其划分为不同簇。在某些情况下,需要考虑两个结果之间的权衡,例如疗效与毒性,或成本与效果。基于此动机,我们将CVRS设计扩展为CVRS2,以考虑两个结果。该设计采用双变量风险评分,并将其划分为簇。我们使用模拟数据评估CVRS2的性质,并在一项随机精神病学试验中展示其应用。我们证明,CVRS2能够在模拟数据中可靠地识别敏感组(即新治疗对两个结果均有益处的组)。我们将CVRS2设计应用于一项心理学临床试验,该试验以犯罪状态和物质使用状态作为两个结果,并收集了大量基线协变量。CVRS2设计对两个结果均产生了显著的治疗效果,而CVRS方法仅在预筛选协变量后才识别出犯罪状态的显著效果。

英文摘要:

The existing cross-validated risk scores (CVRS) design has been proposed for developing and testing the efficacy of a treatment in a high-efficacy patient group (the sensitive group) using high-dimensional data (such as genetic data). The design is based on computing a risk score for each patient and dividing them into clusters using a non-parametric clustering procedure. In some settings it is desirable to consider the trade-off between two outcomes, such as efficacy and toxicity, or cost and effectiveness. With this motivation, we extend the CVRS design (CVRS2) to consider two outcomes. The design employs bivariate risk scores that are divided into clusters. We assess the properties of the CVRS2 using simulated data and illustrate its application on a randomised psychiatry trial. We show that CVRS2 is able to reliably identify the sensitive group (the group for which the new treatment provides benefit on both outcomes) in the simulated data. We apply the CVRS2 design to a psychology clinical trial that had offender status and substance use status as two outcomes and collected a large number of baseline covariates. The CVRS2 design yields a significant treatment effect for both outcomes, while the CVRS approach identified a significant effect for the offender status only after pre-filtering the covariates.

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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