COX模型的生存函数估计

ESTIMATION OF THE SURVIVOR FUNCTION OF COX Model

本文分析了COS模型生存函数估计的Kalbfleisch-prentice方法同Breslow方法的关系。在此基础上提出了两个估计生存函数的公式，计算方便，精确度较高，并和Breslow，提出的两个公式的误差进行了讨论和比较。

This paper makes a suggestion of two formulae about estimation of the survivor function on the base that analyses estimation of the survivor function of COX model for relation between methods of Kalbfleisch-Prentice and Breslow. The estimation of survivor function used the two formulae is easily calculated and the error is smaller then methods suggested by Breslow.