在疫苗临床试验中检测安全信号的树时间扫描统计数据
François Haguinet1, Fabian Tibaldi2, Christophe Dessart1
1Global Safety, GSK, Wavre, Belgium.
Pharmaceutical statistics
|April 16, 2024
概括
对于临床试验安全信号检测,评估了三种树时间扫描统计方法. 自控树时空扫描 (SCTTS) 显示了对短暂影响的更高灵敏度,而基于日志排名的树时空扫描 (LgRTTS) 在检测持续的安全信号方面表现出色.
科学领域:
- 生物统计学 生物统计学
- 临床试验方法论 临床试验方法论
- 药物监督 药物监督 药物监督
背景情况:
- 在临床试验中对安全性数据的定量分析是具有挑战性的,因为有多个重叠的终点.
- 树时间扫描统计方法对其他数据源有效,但在临床试验中未得到充分利用.
研究的目的:
- 评估三种互补的树-时间扫描统计方法在临床试验中的常规定量安全信号检测的性能.
- 使用真实和模拟的临床试验数据,比较这些方法的灵敏度,特异性和预测值.
主要方法:
- 评估自控树时间扫描 (SCTTS),基于组比较的树时间扫描 (BGTTS) 和基于日志排名的树时间扫描 (LgRTTS).
- 将方法应用于来自两个III期临床试验和模拟不良事件 (AE) 的模拟研究的数据.
- 根据真正正值 (TP) 和积极预测值 (PPV) 与参考安全信息对比,评估性能.
主要成果:
- 在一项案例研究中,SCTTS表现出更高的灵敏度,在剂量1后检测到80个真实阳性 (TP) 结果,其中60%的阳性预测值 (PPV).
- LgRTTS检测到49个TP,PPV为69%,在模拟中显示了持久效应的最佳性能.
- BGTTS实现了90%的PPV,但只检测到38个TP;SCTTS在模拟中对短暂效应表现出良好的灵敏度.
结论:
- 三种树-时间扫描统计方法为临床试验中的安全信号检测提供了互补的方法.
- 这些方法有效地适应了对众多重叠的终点的多重测试,而不过于保守.
- 评估的方法加强了定量安全数据分析,有助于在临床开发过程中检测潜在的安全信号.
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