B1232
Title: Goodness-of-fit testing of survival models in the presence of Type II right censoring
Authors: Marike Cockeran - North-West University (South Africa) [presenting]
Abstract: A variety of tests is considered for testing goodness of fit in a parametric Cox proportional hazards (PH) in the presence of Type II right censoring. The testing procedures considered can be divided into two categories: an approach involving transforming the data to a complete sample and an approach using test statistics that can directly accommodate Type-II right censoring. The power of the proposed tests is compared through a Monte Carlo study for various scenarios. It is found that both approaches are useful for testing exponentiality if the censoring proportion in a data set is lower than 30\%, but it is recommended to use the approach that first transforms the sample to a complete sample when one encounters higher censoring proportions.
