Analysis of survival data in Coronary artery disease patients after angioplasty using Cox Regression model

Background and coronary artery disease is one of the major causes of death worldwide and analysis of survival data is important in this patients. The Çox model not only calculates the hazard function but also introduces the other significant variables. 128 patients referred to Mazandaran Heart center from 1383 to 1385 and treated by angioplasty were followed till 1390 for major complications. The time of hospitalization after angioplasty, positive familial history and Diabetus Mellitus were variables that Çox Model showed them significant.Çonclusion: Âccording to our findings and the findings of the previous studies, the risk of restenosis in patients treated by angioplasty increases by the time. The survival of the patients decreases considerably after 60 months. Hazard rate increases severely after 70 month.