There were no differences in cumulative incidence of the primary outcome between the `` monitoring '' and `` no-monitoring '' groups at 1 year ( 58.7 % vs. 52.3 % ; odds ratio , 0.77 ; 95 % confidence interval , 0.38-1 .55 ) or at 5 years after transplantation ( 79.0 % vs. 70.3 % ; odds ratio , 0.63 ; 95 % confidence interval , 0.28-1 .42 ) .