why do i need cox ph what is model selection with cox in ph? why do you overfit the cox model in spss? how to create cox-ph models how to select a cox model for a biomarker when to use a priori and add a variable in a cox model when using cox ph, when can i compared the models? does cox regression include biomarker why would you use a cox model what is cox in spss how to select model for biomarker in ph which model would a biomarker use instead of an a priori model? how to select model from cox ph what is the best method of identifying predictors of a survival outcome using cox regression? when you use cox ph what is the purpose of the model selection what kind of model is spss what to do with an a priori model when does cox ph use predictors how to select a model based off of a cox when using the cox model does the model have to be included in the biomarker