Proportional Hazards Regression

Proportional hazards models and their extensions (models with ti- dependent covariates, models with time dependent regression co- cients, models with random coeficients and any mixture of these) can be used to characterize just about any applied problem to which the techniques of survival analysis are appropriate. This simple obser- tion enables us to find an elegant statistical expression for all plausible practical situations arising in the analysis of survival data. We have a single unif...