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AI 根据所提供的论文材料归类:摘要明确估计随机试验中治疗不依从下的依从者平均因果效应,属于因果推断。

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A Bayesian Hierarchical CACE Model Accounting for Incomplete Noncompliance With Application to a Meta-analysis of Epidural Analgesia on Cesarean Section

处理不完整依从信息的贝叶斯分层 CACE 模型:硬膜外镇痛与剖宫产的荟萃分析

正在核对关联版本…

代码、数据与补充材料

正在核对对应版本的资源…

关注这篇论文的作者
Jincheng Zhou
James S. Hodges
Haitao Chu

处理不完整依从信息的贝叶斯分层 CACE 模型:硬膜外镇痛与剖宫产的荟萃分析

研究问题
在随机试验荟萃分析中,部分研究缺少治疗不依从信息且研究间存在异质性时,如何估计依从者平均因果效应并纳入这些研究?
方法与思路
作者提出贝叶斯分层 CACE 框架,同时处理异质和不完整的不依从信息,并应用于硬膜外镇痛对剖宫产影响的试验荟萃分析。
材料陈述的贡献
摘要称,新分析纳入全部二十七项研究,而仅十项具有完整依从信息;论文报告 CACE 估计结果并用模拟评估方法表现。
阅读关注点
应核对 CACE 的识别假设、缺失依从信息的机制、层级模型如何共享信息,以及总体平均效应的权重和先验敏感性。
阅读边界
依据版本未注明的 OpenAlex 索引摘要;缺失机制与识别条件未说明,所报 CACE 可信区间跨零,不能据此断言存在明确的非零效应。

原文摘要

Noncompliance with assigned treatments is a common challenge in analyzing and interpreting randomized clinical trials (RCTs). One way to handle noncompliance is to estimate the complier-average causal effect (CACE), the intervention's efficacy in the subpopulation that complies with assigned treatment. In a two-step meta-analysis, one could first estimate CACE for each study, then combine them to estimate the population-averaged CACE. However, when some trials do not report noncompliance data, the two-step meta-analysis can be less efficient and potentially biased by excluding these trials. This paper proposes a flexible Bayesian hierarchical CACE framework to simultaneously account for heterogeneous and incomplete noncompliance data in a meta-analysis of RCTs. The models are motivated by and used for a meta-analysis estimating the CACE of epidural analgesia on cesarean section, in which only 10 of 27 trials reported complete noncompliance data. The new analysis includes all 27 studies and the results present new insights on the causal effect after accounting for noncompliance. Compared to the estimated risk difference of 0.8% (95% CI: -0.3%, 1.9%) given by the two-step intention-to-treat meta-analysis, the estimated CACE is 4.1% (95% CrI: -0.3%, 10.5%). We also report simulation studies to evaluate the performance of the proposed method.

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