Survival Analysis Part II: Multivariate data analysis – an introduction to concepts and methods

The Cox (proportional hazards or PH) model It is a survival analysis regression model, which describes the relation between the event incidence, as expressed by the hazard function and a set of covariates. A fuller explanation of the hazard function was given in the previous article Put briefly, the hazard is the instantaneous event probability at a given time, or the probability