L-抗发作药物的临床试验中不确定性和平均发作频率之间的关系
Wesley T Kerr1,2, Neo Kok1, Katherine N McFarlane1
1Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Epilepsia
|December 31, 2025
概括
在试验中,发作频率 (SF) 的不确定性随着平均SF的增加而增加. 在高SF患者中计数更多的发作提供了比增加的不确定性构成的更大的统计效益,为试验设计提供了信息.
科学领域:
- 的研究研究.
- 临床试验的设计
- 生物统计学 生物统计学
背景情况:
- 抗发作药物经过严格的临床试验来证明有效性,主要通过减少发作频率 (SF) 来衡量.
- 这些试验的统计能力取决于治疗效应的规模和不确定性,因此需要仔细选择包含标准以进行可靠的SF测量.
研究的目的:
- 调查临床试验中平均发作频率 (SF) 和其不确定性 (标准偏差) 之间的关系.
- 为优化基于SF的纳入标准和在症药物开发中的统计功率计算提供定量见解.
主要方法:
- 来自11个双盲,安慰剂对照试验的数据分析,用于焦点或泛性.
- 使用日志日志多变量回归来将维护期间的SF标准偏差与基线和维护期间的平均SF联系起来.
- 评估了捕捉高SF参与者的更多发作的影响,并评估了协会在时间到事件设计中的持久性.
主要成果:
- 证实了维护SF的不确定性 (SD) 与基线平均SF之间的比例关系.
- 与更高的SF相关的不确定性增加,通过计算更多的扣押被有效地抵消.
- 当使用时间到事件设计时,这些关联保持一致.
结论:
- 验证了基本的L关系:扣押数不确定性尺度与平均SF.
- 将高SF参与者的更多发作纳入试验的统计优势超过了增加不确定性所带来的挑战.
- 结果提供了关键的定量数据,用于改进基于SF的临床试验中的纳入标准和功率计算.
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