Figure 3: Predictive value of ASTi for primary nonfunction and one-year graft survival. (a) A logistic regression model showed that ASTi has significant impact on PNF (hazard ratio 1.0003 (95% CI: 1.0003–1.0007), ). If ASTi is greater than 2,000 IU/L, there is an exponential increase of hazard ratio for PNF along with increased ASTi. (b) A Cox proportional hazard model showed that ASTi has significant impact on graft survival (hazard ratio 1.0002 (95% CI: 1.0001–1.0003), ). If ASTi is greater than 3,500 IU/L, there is an exponential increase of hazard ratio for PNF along with increased ASTi.