Estimation and Analysis for breast cancer patients from date of diagnosis until death by using Cox model An case study of breast cancer patients at National Center for Radiotherapy and Nuclear Medicine - Khartoum 2009 - 2011

Abstract

This study aimed to build a model suitable to describe the difference in the risk of death for patients with breast cancer to those who have been giving them chemotherapy and who have not been giving them chemotherapy using a Cox model hazard ratio, and data were collected from the records of patients with breast cancer at the National Center for radiotherapy and nuclear medicine in Khartoum at the period (2009 -2011). The study reached the following results: There are significant differences on hazard ratio among patients who given the chemotherapy and who did not given chemotherapy, there is a significant difference to the hazard ratio in terms of the stage of the disease, there are significant differences between patients who given radiotherapy and those who did not given radiotherapy in terms of hazard ratio, there are significant differences between patients who given hormonal therapy and those who did not given hormonal therapy in terms of hazard ratio, there are significant differences on hazard ratio among patients who have undergone surgery, and those who did not undergo surgery The study recommended the following: The possibility of using the Cox model for the hazard ratio of multivariate in the calculation of the value of hazard at any given time and the use of parametric survival regression models in the analysis of the study data.