在多臂多阶段设计中的高效阶段性分配比率
Ruqayya A Azher1, Michael J Grayling2, James M S Wason3
1Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK; Medical College, Umm Al-Qura University, Makkah, Saudi Arabia.
Contemporary clinical trials
|April 11, 2025
概括
在多臂多阶段 (MAMS) 试验中优化分配比率可以提高统计能力. 将这些比率调整为特定的试验目标,如边际,断层或连接力,可以提高药物开发中的决策和资源效率.
科学领域:
- 临床试验设计 临床试验设计
- 统计学方法论 统计学方法论
- 药学研究 药学研究
背景情况:
- 多臂多阶段 (MAMS) 设计通过同时评估多种治疗方法来加速药物开发.
- 提高MAMS设计的效率是一个持续的研究重点.
- 本研究调查了不同阶段的分配比率如何影响MAMS试验功率和预期样本大小 (ESS).
研究的目的:
- 开发一种方法来计算MAMS设计的运行特征,该设计具有固定的最大样本大小和不同阶段的分配比率.
- 评估不同分配比率组合对边际,断层和连接功率的影响.
- 评估分配比率对预期样本大小 (ESS) 的影响.
主要方法:
- 开发了一种方法来计算MAMS运行特征,不同阶段的分配比率有所变化.
- 该研究评估了共同分配比率组合,假设每个阶段的样本大小相同,结果的正常分布.
- 参数来源于现实世界的临床试验,以实现现实的评估.
主要成果:
- 有效的阶段性分配比率取决于正在优化的特定类型的统计能力.
- 随着对控制臂的分配增加,边际和断路功率会有所改善,但最佳比率不同.
- 联合力量从控制和实验武器之间更平衡的分配中受益.
- 观察到的分配比率的变化对ESS的影响最小.
结论:
- 各阶段的分配比率对于将MAMS试验设计与具体目标相协调至关重要.
- 优化这些比率可以显著提高统计能力和试验效率.
- 在MAMS试验中,知情的分配策略可以改善决策,并最大限度地减少资源利用.
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