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分类依据与纠错

AI 根据所提供的论文材料归类:摘要直接研究时变混杂和删失条件下,多种纵向间歇性治疗的因果效应估计。

反馈分类问题

Estimating the causal effects of multiple intermittent treatments with application to COVID-19

多种间歇性治疗的因果效应估计及其新冠应用

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
Liangyuan Hu
Jiayi Ji
Himanshu Joshi
Erick Scott
Fan Li

多种间歇性治疗的因果效应估计及其新冠应用

研究问题
多种治疗可反复开始和停止、观测时间又不规则时,如何控制时变混杂与删失,比较这些治疗对患者生存结局的因果影响?
方法与思路
作者构建联合边际结构生存模型,将治疗切换描述为带不连续资格区间的复发事件,并用生存机器学习与核强度估计构造连续时间权重。
材料陈述的贡献
摘要称,方法无需离散化或人为对齐测量时点,模拟中相较所选传统方法改善偏差和覆盖率,并应用于新冠治疗的死亡或入住重症结局。
阅读关注点
应核对连续时间权重的识别条件、治疗资格及切换过程的定义,以及时变混杂、删失和机器学习估计误差如何影响推断。
阅读边界
这是 arXiv 预印本,同行评审或期刊接收未获核实;摘要未列出完整假设、模拟数值及具体治疗效应,比较优势限于所考察场景。

原文摘要

To draw real-world evidence about the comparative effectiveness of multiple time-varying treatments on patient survival, we develop a joint marginal structural survival model and a novel weighting strategy to account for time-varying confounding and censoring. Our methods formulate complex longitudinal treatments with multiple start/stop switches as the recurrent events with discontinuous intervals of treatment eligibility. We derive the weights in continuous time to handle a complex longitudinal dataset without the need to discretize or artificially align the measurement times. We further use machine learning models designed for censored survival data with time-varying covariates and the kernel function estimator of the baseline intensity to efficiently estimate the continuous-time weights. Our simulations demonstrate that the proposed methods provide better bias reduction and nominal coverage probability when analyzing observational longitudinal survival data with irregularly spaced time intervals, compared to conventional methods that require aligned measurement time points. We apply the proposed methods to a large-scale COVID-19 dataset to estimate the causal effects of several COVID-19 treatments on the composite of in-hospital mortality and ICU admission.

笔记与分组