Methods: The medical documents of CEVB patients were reviewed retrospectively and the data were collected. Univariate and multivariate Logistic regressions were performed, in which the discharged results (survival or death) as dependent variable and the results of liver function, kidney function, serum electrolytes and blood cell analysis as independent variables. The multivariate regression equation was as the model for the prediction of patient outcome and its predictive performance was evaluated.