Survival, Cox Regression, Kaplan Meier, Weibull Distribution, Accelerated Failure Time.
not failed up to that point in time. Hence, a Hazard Ratio is the ratio between 2 Hazard Rates. The CPHM model assumes that the Hazard Ratio is constant over time. This is why the CPHM is called a proportional hazard model. The model assumes NO dependence on time! This assumption is called the