通过目标分布平衡估计抗原测试敏感性:开发和验证研究
Miguel Bosch1,2, Adriana Moreno2, Raul Colmenares2
1IDX20 Inc, 166 Clinton Road, Brookline, MA, United States, 1 6177347745.
JMIR bioinformatics and biotechnology
|December 4, 2025
概括
这项研究引入了一种统计方法,通过调整病毒载荷变化来标准化侧流抗原测试 (AT) 的灵敏度. 这种方法可以确保在不同研究和供应商之间更公平,更准确地比较诊断测试性能.
科学领域:
- 生物统计学 生物统计学
- 传染病诊断 传染病诊断 传染病诊断
- 医疗器械评估 医疗器械评估
背景情况:
- 侧流抗原测试 (ATs) 用百分比阳性协议 (PPA) 对定量逆转录聚合酶链反应 (qRT-PCR) 的敏感性进行评估.
- 观察到的PPA受病毒载荷分布的影响 (从周期值[Ct]值推断出来),导致偏差的灵敏度估计和复杂的跨研究比较.
- 现实世界的数据往往缺乏标准化的病毒载荷采样,偏离监管指南,妨碍了准确的诊断测试评估.
研究的目的:
- 开发和验证用于重新校准AT临床性能数据的统计方法.
- 通过标准化病毒载荷分布,使准确和可比的敏感性评估成为可能.
- 为了纠正诊断测试评估中的采样偏差.
主要方法:
- 作为qRT-PCR Ct值 (PPA函数) 的逻辑函数,建模的百分比阳性协议 (PPA).
- 将PPA函数应用于标准化参考Ct分布以计算调整的灵敏度.
- 通过社区研究的临床数据验证了方法,证明了样本偏差减少.
主要成果:
- 分析了两年来四家供应商的AT和qRT-PCR数据,观察了Ct值分布的显著变化.
- 对PPA的逻辑回归建模与Ct值对病毒载荷变异性进行校正.
- 调整后的灵敏度估计提供了更准确和更一致的AT性能对供应商的比较.
结论:
- 引入了一个分布意识框架,用于对AT的偏差纠正灵敏度估计.
- 该方法促进了在AT供应商和研究中进行更公平,更一致的比较,提高了质量控制和监管审查.
- 强调了分布意识评估对于稳健的诊断测试评估的重要性.
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