Aalen Plots Under Proportional Hazards
研究了Mau的图形方法在Cox比例风险模型下的表现，并提出改进以帮助解释协变量的时间依赖性效应。
SUMMARY Mau's graphical method for the detection of time-dependent effects of covariates in survival data is based on a linear model for the hazard function suggested by Aalen. The performance of the technique under the more common Cox proportional hazards model is considered and a modification designed to aid interpretation is suggested.