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arXiv 2402.02306stat.MEstat.COstat.ML
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一种用于存在时变混杂的因果生存分析的灵活贝叶斯g-formula

A flexible Bayesian g-formula for causal survival analyses with time-dependent confounding

Xinyuan Chen, Liangyuan Hu, Fan Li

AI总结:

本文提出一种结合BART的灵活贝叶斯g-formula,用于存在时变混杂的因果生存分析,可纳入纵向平衡得分并支持静态与动态治疗策略,通过模拟和电子健康记录数据验证其性能。

摘要:

在具有时间-事件结局的纵向观察性研究中,因果分析的一个常见目标是在假设干预情景下估计因果生存曲线。g-formula 是进行该分析的有用工具。为增强传统参数化 g-formula,我们开发了一种替代的 g-formula 估计量,将 Bayesian Additive Regression Trees (BART) 纳入时变生成成分的建模中,旨在减轻因模型误设导致的偏倚。我们聚焦于二值时间变化治疗,并针对离散生存数据引入一类可纳入纵向平衡得分的通用 g-formula。这些纵向平衡得分的最小充分形式与治疗策略的性质(即静态或动态)相关联。针对每种治疗策略类型,我们提供了后验采样算法。我们进行了模拟以说明所提方法的经验性能,并利用 Yale New Haven Health System 电子健康记录数据展示了其实际效用。

英文摘要:

In longitudinal observational studies with time-to-event outcomes, a common objective in causal analysis is to estimate the causal survival curve under hypothetical intervention scenarios. The g-formula is a useful tool for this analysis. To enhance the traditional parametric g-formula, we developed an alternative g-formula estimator, which incorporates the Bayesian Additive Regression Trees (BART) into the modeling of the time-evolving generative components, aiming to mitigate the bias due to model misspecification. We focus on binary time-varying treatments and introduce a general class of g-formulas for discrete survival data that can incorporate the longitudinal balancing scores. The minimum sufficient formulation of these longitudinal balancing scores is linked to the nature of treatment strategies, i.e., static or dynamic. For each type of treatment strategy, we provide posterior sampling algorithms. We conducted simulations to illustrate the empirical performance of the proposed method and demonstrate its practical utility using data from the Yale New Haven Health System's electronic health records.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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