ABSTRACT
Chapter 5 is now extended with another approach to estimating survival, where the main focus is on parametric models such as the Weibull and a nonparametric approach that includes the Cox proportional hazards model. These models use the survival time of each patient that experience an event (death, time to recurrence, etc.) and also, the time of survival for those patients that are censored, namely, those that are lost to follow-up. The survival time up to the point when the patient withdraws (lost to follow-up) is known and utilized to estimate the survival experience of a group of interest.
