arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1104.4338stat.MEq-bio.QM
收藏

基于接触间隔的流行病数据非参数生存分析

Nonparametric survival analysis of epidemic data

Eben Kenah

AI总结:

本文提出基于接触间隔的流行病数据非参数生存分析方法,利用Nelson-Aalen估计量及EM算法处理传播网络观测不确定性,并证明其可扩展链二项模型至连续时间。

摘要:

本文开发了基于接触间隔的流行病数据非参数生存分析方法。从个体i到个体j的接触间隔是指个体i传染性发作到其与个体j发生传染性接触之间的时间,其中传染性接触定义为足以使易感者感染的接触。我们证明,当观察到谁传染谁时,Nelson-Aalen估计量能无偏估计接触间隔累积风险函数。当未观察到谁传染谁时,我们使用EM算法对所有与观察数据一致的传播网络的Nelson-Aalen估计进行平均。这收敛到接触间隔累积风险函数的非参数MLE,我们称之为边际Nelson-Aalen估计。我们在模拟中研究这些方法的行为,并用其分析2009年甲型H1N1流感大流行的家庭监测数据。附录中,我们证明这些方法将链二项模型扩展到连续时间。

英文摘要:

This paper develops nonparametric methods for the survival analysis of epidemic data based on contact intervals. The contact interval from person i to person j is the time between the onset of infectiousness in i and infectious contact from i to j, where we define infectious contact as a contact sufficient to infect a susceptible individual. We show that the Nelson-Aalen estimator produces an unbiased estimate of the contact interval cumulative hazard function when who-infects-whom is observed. When who-infects-whom is not observed, we average the Nelson-Aalen estimates from all transmission networks consistent with the observed data using an EM algorithm. This converges to a nonparametric MLE of the contact interval cumulative hazard function that we call the marginal Nelson-Aalen estimate. We study the behavior of these methods in simulations and use them to analyze household surveillance data from the 2009 influenza A(H1N1) pandemic. In an appendix, we show that these methods extend chain-binomial models to continuous time.

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。

↑