Time-Dependent Covariates in Survival Analysis
本文从Cox比例风险模型出发，推导出Wilcoxon检验是含时变协变量的Cox模型的一个特例，为处理删失生存数据提供了另一种分析方法。
The log rank and modified Wilcoxon test statistics are two alternative methods of analysis for censored survival data. It is well known that the log rank test can be derived from the model of Cox (1972). This paper derives the Wilcoxon test as a special case of Cox's model with a time-dependent covariate.