The time from the primary treatment of the breast cancer to the death of the patient.
                                                            
                                                     
                        
                                                
                        
                        
                            The percentage of subjects in a study who have survived for a defined period of time. It is usually reported as a hazard ratio.
                                                            
                                                     
                        
                                                
                        
                        
                            The total amount of time that a patient survives following treatment, including relapses that were successfully retreated. See Event-free survival.