Objective:To analyze the survival rate and the risk factors in patients with biliary atresia(BA)who underwent portoenterostomy(Kasai)procedure. Methods:Totally 132 patients with biliary atresia who underwent Kasai procedure from Janunary 2007 to Janunary 2014 were recruited to this study. Data including age for Kasai procedure,presence of cirrhosis at the time of operation,use of steroids after operation and CMV infection were input in SPSS 19.0. Survival rates of the patients were calculated by life table....