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Bayesian sample size calculations in phase II clinical trials using informative conjugate priors.

机译:贝叶斯样本量的计算在II期临床试验中使用了先验的共轭先验信息。

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摘要

A number of researchers have discussed phase II clinical trials from a Bayesian perspective. A recent article by Tan and Machin focuses on sample size calculations, which they determine by specifying a diffuse prior distribution and then calculating a posterior probability that the true response will exceed a prespecified target. In this article, we extend these sample size calculations to include informative prior distributions using various strategies that allow researchers with both optimistic and pessimistic priors direct involvement in the sample size decision making. We select the informative priors via multiple methods determined by the mean, median or mode of the conjugate prior. These cases can result in varying sample sizes.
机译:许多研究人员从贝叶斯的角度讨论了II期临床试验。 Tan和Machin最近发表的一篇文章着重于样本大小的计算,他们通过指定弥散先验分布,然后计算真实响应将超过预定目标的后验概率来确定。在本文中,我们使用各种策略扩展了样本量的计算,以包括信息丰富的先验分布,这些策略使研究人员能够将乐观和悲观先验直接参与到样本量决策中。我们通过由共轭先验的均值,中位数或众数确定的多种方法选择信息先验。这些情况可能会导致样本大小变化。

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