Department of Epidemiology and Health Statistics West China School of Public Health and West China Fourh Hospital Sichuan University Chengdu 610044 China;
Department of Epidemiology and Health Statistics West China School of Public Health and West China Fourh Hospital Sichuan University Chengdu 610044 ChinaNational Clinical Research Center for Geriatrics West China Hospital Sichuan University Chengdu 610044 China;
Department of Epidemiology and Health Statistics West China School of Public Health and West China Fourh Hospital Sichuan University Chengdu 610044 China;
The First Clinical College of Lanzhou University Lanzhou 730000 China;
Department of Epidemiology and Health Statistics West China School of Public Health and West China Fourh Hospital Sichuan University Chengdu 610044 China;
Department of Epidemiology and Health Statistics West China School of Public Health and West China Fourh Hospital Sichuan University Chengdu 610044 China;
Department of Medical Record West China Second University School Chengdu 610044 China;
Department of Epidemiology and Health Statistics West China School of Public Health and West China Fourh Hospital Sichuan University Chengdu 610044 China;
Department of Neurology West China Hospital of Sichuan Universit Chengdu 610044 China;
Department of Neurology West China Hospital of Sichuan Universit Chengdu 610044 China;
Department of Epidemiology and Health Statistics West China School of Public Health and West China Fourh Hospital Sichuan University Chengdu 610044 China;
ischemic stroke; lesion location; prevention; recurrence; flexible parametric survival models; survival analysis;