are survival estimates hazard function can cox survival be used to calculate survival when is the hazard function not available and the baseline hazard cannot be defined? why is it not possible to use hazard in cox regression is there a hazard function in cox regression what is cox survival analysis which of the following is true when a hazard and survival curve are not available cox survival regression which regression model is best for hazard survival estimator does cox survival model have covariates what is the hazard function for cox survival regression is the hazard function in cox survival regression available cox survival coefficient cox survival estimator what is the cox survival function is cox regression true or false cox regression hazard survival cox survival curves why is hazard function unavailable cox regression can cox survival depend on baseline hazard