A randomized trial comparing triple-drug and double-drug therapy in renal transplantation. Analysis at 7 years

Abstract

This is the 7-year update of a randomized trial comparing triple (TT) and double (DT) immunosuppressive therapy in renal transplantation. At 7 years, patient survival rate was 85% in DT vs. 87% in TT (P = NS); graft survival rate was 73% in DT and 68% in TT (P = NS); pure graft survival was 86% in DT vs. 77% in TT (P = 0.096). The 7-year graft survival rate was 67% for cadaver graft recipients vs. 92% for living-related graft recipients (P = 0.044). No difference in the slopes of plasma creatinine between the two groups was observed. Ten DT and 13 TT patients changed their original therapy: statistical analysis, however, was carried out according to intention to treat. Both CsA levels and doses were significantly higher in DT than in TT group (P < 0.001) at any time point up to the 7th year. At univariate analysis, a living-related donor kidney (P = 0.044) and immediate recovery of renal function (P < 0.001) were the only two parameters associated with graft survival at 7 years. At multivariate analysis, only early graft function recovery was correlated with late graft survival (RR = 10.480). Thus, even in the longterm, there is no difference between DT and TT, either in patient or in graft survival: at the doses we used, TT had a lower prevalence of late side effects than DT, however, long-term pure graft survival was better, although not significantly, in DT than in TT. The possibility of a safe shift from one regimen to the other one makes the two treatments complementary rather than alternatives.