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使用替代信息进行高效测试
Rebecca Knowlton1, Layla Parast1
1Department of Statistics and Data Sciences, University of Texas at Austin, Austin, Texas, USA.
Biometrical journal. Biometrische Zeitschrift
|October 28, 2025
概括
这项研究引入了一种新的非参数方法,用于临床试验,以便在患者组之间有效性不同时有效地使用代用标记. 这种方法可以提高治疗效果的估计和假设测试,即使在所有参与者都没有测量初级结果的情况下.
科学领域:
- 生物统计学 生物统计学
- 临床试验设计 临床试验设计
- 卫生经济学 卫生经济学
背景情况:
- 临床试验面临使用代用标记物的压力,因为主要结果的成本和时间限制.
- 现有的替代标记分析方法通常依赖于严格的参数假设或假定具有普遍的替代有效性.
- 跨患者子组的替代标记器实用性的异质性对传统的分析方法构成了挑战.
研究的目的:
- 开发一种完全非参数的方法,用于使用替代信息 (ETSI) 的高效测试.
- 为了解决异质性的代理标记器实用性的设置,其中代理仅适用于特定患者子组.
- 为了在复杂的临床试验场景中实现可靠的治疗效果估计和假设测试.
主要方法:
- 开发了一种完全非参数的方法,称为使用替代信息 (ETSI) 进行高效测试.
- 使用基于核心的估计来估计治疗效果和测试假设.
- 设计了用于用于替代标记物用于有效子组的场景的方法,并在剩余患者中测量初级结果.
主要成果:
- 在存在异质代用标记的实用性的情况下,ETSI允许高效的假设测试和治疗效果估计.
- 该方法适用于当所有参与者都没有测量主要结果的情况.
- 模拟研究和对艾滋病毒临床试验的应用证明了该方法的性能.
结论:
- ETSI方法为在临床试验中使用具有异质代孕有效性的代孕标志物提供了灵活和强大的框架.
- 这种方法可以带来更及时和更具成本效益的关于治疗有效性的决策.
- 该研究为未来的临床试验设计提供了一个框架,包括功率和样本大小的估计.
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