A characterisation of the proportional hazards model through a measure of discrimination between two residual life distributions
通过两个剩余寿命分布的区分度刻画比例风险模型
A time-dependent Kullback-Leibler discrimination function is defined by comparing residual life distributions at each age t. It is proved that the resulting Kullback-Leibler discrimination function is constant in t if and only if the two survival distributions satisfy a proportional hazards model.