在多发性硬化症临床试验中发现PIRA对估计治疗效果的偏差
Noemi Montobbio1, Francesca Bovis1, Alessio Signori1
1Department of Health Sciences (DISSAL), University of Genoa, Genoa, Italy.
EBioMedicine
|June 24, 2025
概括
既定的定义可能会偏向多发性硬化症 (MS) 试验结果,以使进展独立于复发活动 (PIRA). 一个补充PIRA定义,不包括复发相关恶化,为临床试验提供了一个不那么有偏见和更简单的方法.
科学领域:
- 神经学 神经学
- 临床试验 临床试验
- 生物统计学 生物统计学
背景情况:
- 进展独立于复发活动 (PIRA) 是多发性硬化症 (MS) 临床试验的关键终点.
- 现有的PIRA定义可能会产生偏见的治疗效果估计,特别是当治疗减少复发时.
研究的目的:
- 用OPERA I/II试验的汇总数据来评估不同的PIRA定义.
- 在MS临床试验中评估和量化与各种PIRA定义相关的偏差.
主要方法:
- 将多个PIRA定义应用于OPERA I/II试验数据 (NCT01247324,NCT01412333) 的数据.
- 使用危险比率 (HRs) 和风险比率 (RRs) 量化治疗效应.
- 评估偏差使用模拟EDSS数据与控制的复发和PIRA治疗效果.
主要成果:
- 根据所使用的定义,PIRA的治疗效果估计有很大的差异 (HR 0.83至0.73).
- 模拟数据显示,已建立的PIRA定义低估了真正的治疗效果,偏差随着复发减少而增加.
- 一个补充PIRA定义,不包括复发相关恶化 (RAW),被证明不那么有偏见,操作上更简单.
结论:
- 对于MS临床试验,建议使用"补充"的PIRA定义.
- 通过适当的访问时间来准确排除RAW对于这个定义至关重要.
- 这种方法旨在提供更少偏见和更可靠的PIRA终点评估.
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