arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2409.04716stat.APmath.STstat.TH
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面向分布式数据的 Cox 比例风险模型中的隐私增强协作推断

Privacy enhanced collaborative inference in the Cox proportional hazards model for distributed data

Mengtong Hu, Xu Shi, Peter X. -K. Song

AI总结:

针对多中心分布式生存分析中的数据共享与隐私泄露问题,提出仅交换低维汇总统计量的协作式 Cox 比例风险模型,并用理论、模拟和 OPTN 肾移植数据验证其近集中式性能。

摘要:

数据共享障碍是多中心临床研究中出现的首要挑战,在这类研究中,多个数据源以分布式方式存储在不同的本地研究机构。尤其在 Cox 比例风险模型需要全局风险集的时间至事件分析情形中,通常必须访问集中式数据库。将此类数据源合并到共同数据存储中以进行集中式统计分析,需要签订数据使用协议,而这往往非常耗时。此外,构建风险集并将其分发给参与的临床中心以供后续计算,可能带来泄露个体层面信息的风险。我们提出一种新的协作式 Cox 模型,该模型无需访问集中式数据库,也无需构建全局风险集,而只需要共享维度远小于风险集的汇总统计量。因此,所提出的协作推断能够最大程度地保护数据隐私。我们从理论和数值上表明,与需要合并全部数据的集中式方法相比,这种新的分布式比例风险模型方法在统计功效上几乎没有损失。我们提出一种可再生筛方法,用于建立所提方法的大样本性质。我们通过模拟实验以及来自器官获取与移植网络(Organ Procurement and Transplantation Network,OPTN)肾移植患者的真实数据示例来说明其性能,以理解与美国接受肾移植患者的5年死亡删失移植物衰竭(death-censored graft failure,DCGF)相关的因素。

英文摘要:

Data sharing barriers are paramount challenges arising from multicenter clinical studies where multiple data sources are stored in a distributed fashion at different local study sites. Particularly in the case of time-to-event analysis when global risk sets are needed for the Cox proportional hazards model, access to a centralized database is typically necessary. Merging such data sources into a common data storage for a centralized statistical analysis requires a data use agreement, which is often time-consuming. Furthermore, the construction and distribution of risk sets to participating clinical centers for subsequent calculations may pose a risk of revealing individual-level information. We propose a new collaborative Cox model that eliminates the need for accessing the centralized database and constructing global risk sets but needs only the sharing of summary statistics with significantly smaller dimensions than risk sets. Thus, the proposed collaborative inference enjoys maximal protection of data privacy. We show theoretically and numerically that the new distributed proportional hazards model approach has little loss of statistical power when compared to the centralized method that requires merging the entire data. We present a renewable sieve method to establish large-sample properties for the proposed method. We illustrate its performance through simulation experiments and a real-world data example from patients with kidney transplantation in the Organ Procurement and Transplantation Network (OPTN) to understand the factors associated with the 5-year death-censored graft failure (DCGF) for patients who underwent kidney transplants in the US.

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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