误导性和可避免的:在评估癌症查的观察性研究中的设计诱导偏差 - - 查结肠镜检查局部特异性有效性的例子
Malte Braitmaier1, Sarina Schwarz2, Vanessa Didelez1,3
1Department of Biometry and Data Management, Leibniz Institute for Prevention Research and Epidemiology - BIPS, Bremen, Germany.
American journal of epidemiology
|April 3, 2025
概括
目标试验仿真 (TTE) 纠正了观察性研究中的偏差. 正确对齐的查结肠镜检查显示,在远端和近端结肠直肠癌 (CRC) 预防方面具有相似的有效性.
科学领域:
- 流行病学 流行病学
- 胃肠病学 胃肠病学
- 生物统计学 生物统计学
背景情况:
- 关于癌症查有效性的观察性研究可能会因在零时点的非对齐而产生偏见.
- 目标试验仿真 (TTE) 是一种方法,通过调整研究开始时间来避免这种偏差.
- 结肠直肠癌 (CRC) 查结肠镜的有效性可能因瘤的位置 (远距离或近距离) 而异.
研究的目的:
- 为了说明目标试验仿真 (TTE) 如何避免观察性研究中的设计诱导偏差.
- 评估查结肠镜在预防远端与近端CRC的特定部位的有效性.
- 为了比较四个不同的研究设计 (队列和病例控制,有/没有时间零对齐) 的结果.
主要方法:
- 采用了目标试验仿真 (TTE) 原则,通过在零时点对准参与者.
- 在12年的随访中分析了55-69岁的德国医疗保健数据库.
- 查结肠镜与没有查结肠镜的比较,使用队列和病例对照设计,既有和没有时间零对齐.
主要成果:
- 零时对齐分析 (队列和病例对照) 显示查结肠镜对于减少远端和近端CRC发病率具有相似的有效性.
- 非对齐的分析表明,与近端CRC相比,远端CRC发病率的减少要大得多.
- 不对齐的分析错误地表明,结肠镜在远端结肠中具有更强的预防作用.
结论:
- 违反基本的研究设计原则,如时间零对齐,可以显著偏差观测研究结果.
- 目标试验模拟 (TTE) 有效地避免了设计诱导的偏见,提供了更准确的查有效性的估计.
- 查结肠镜在使用适当的方法分析时,在预防远端和近端结肠直肠癌方面表现出相似的有效性.
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