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本页整理公开书目信息,不生成学术质量评分。AI 解读根据题名及所注明的摘要或原文片段生成,未完成全文核验,可能有误;具体假设、证明与结论请核对原文。摘要保留来源文本,未经模型改写。

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AI 根据所提供的论文材料归类:摘要明确讨论随机试验中的治疗差异检验及未完成终点判定的处理,直接涉及干预效果的推断。

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关注这篇论文的作者
Thomas D Cook
Michael R Kosorok

事件判定不完整时的事件发生时间数据分析

研究问题
在随机临床试验的中期分析中,部分已报告事件尚未完成终点判定时,如何估计生存结果并比较治疗差异?
方法与思路
作者根据已完成判定的事件估计确认概率,并按未判定事件成为首次主要事件的概率赋权,开展生存估计和检验。
材料陈述的贡献
摘要称,赋权可得到一致的生存概率和回归参数估计及无偏log-rank检验,并以模拟和两个试验数据示例说明。
阅读关注点
应核对已判定事件向未判定事件推广的条件、首次事件概率的计算、方差估计,以及中期检验的具体实施。
阅读边界
仅据版本未注明的索引摘要;一致性与检验无偏性所需条件未列明,也未说明中期多次检验的控制,不能推断刊本变化。

原文摘要

In many multicenter, randomized clinical trials, the primary outcome is the time to the first of a number of possible clinical events. An event classification committee may be convened to determine whether events that have been reported by investigators meet the predetermined criteria for primary endpoint events. When interim analyses are performed in such trials, the final classification for many reported events will not be known. Failure to account for the uncertain status of these events may result in incorrect interim analysis. The probability that an unadjudicated event will be confirmed as a primary event can typically be estimated from those events for which adjudication is complete. We show that if each unadjudicated event is weighted according to the probability that it will be the first primary event, then consistent estimates of survival probabilities and regression parameters can be obtained and unbiased log-rank tests of treatment differences performed. Moderate sample consistency of point estimates and variance estimates is verified by simulation. The procedure is illustrated using data from the Coumadin Aspiring Reinfarction Study (CARS) and the Weekly Intervention with Zithromax for Atherosclerosis and Related Diseases (WIZARD) study.

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