在平台试验中分配比例不平等的操作特征,使用二进制终点分阶段添加药物
Yosuke Shimizu1,2, Ryoichi Hanazawa1, Hiroyuki Sato1
1Department of Clinical Biostatistics, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan.
Contemporary clinical trials communications
|March 10, 2025
概括
在平台试验 (PT) 中分配比例不平等可以增加总样本大小和研究持续时间,但保留假设测试能力. 这项研究量化了在传染病试验中对并发对照的这些权衡.
科学领域:
- 临床试验方法论 临床试验方法论
- 生物统计学 生物统计学
- 传染病 研究 研究 研究 传染病
背景情况:
- 平台试验 (PT) 经常使用共享的安慰剂对照组.
- 对于不平等的分配比率 (例如,k:1安慰剂与药物) 存在建议,其中k是并发药物臂的数量.
- 这些不平等的PT比率的实际含义需要进一步研究.
研究的目的:
- 在平台试验中,比较平等与不平等的分配比率的性能.
- 为了评估操作特征,如I型错误率,统计能力和总样本大小.
- 模拟实际的平台试验条件与并发的对照和传染病的二元终点.
主要方法:
- 模拟研究是为了模仿平台试验而进行的.
- 比较主要集中在平等和不平等的分配比率上.
- 评估的操作特征包括I型错误率,功率和传染病住院患者的总样本大小.
主要成果:
- 不平等的分配比率可以显著增加总样本大小并延长研究持续时间,特别是在每月患者入学率低的情况下.
- 尽管样本大小增加,但不平等的分配通常保持了与平等的分配相比,对假设测试的目标功率.
- 在安慰剂组中,每增加100名患者的平均功率增加约为1.9%,分配不平等.
结论:
- 在平台试验中的分配比率不平等具有定量优势和缺点.
- 这些发现是特定于模拟条件,包括并发控制和二进制终点.
- 该研究提供了关于在传染病平台试验中不平等分配的实际实用性的见解.
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