A Cochrane review included 33 studies with a total of 7114 subjects. No differences in the hard-end points of patient and graft survival were demonstrated for or against TOR-I in any comparison. Generally surrogate endpoints for graft survival favour TOR-I (lower risk of acute rejection and higher GFR, mean difference compared to calcineurin inhibitors 14.94 mL/min, 95% CI 9.33 to 20.55) and surrogate endpoints for patient outcomes are worsened by TOR-I (bone marrow suppression, lipid disturbance).
Comment: Data were limited beyond two years post-transplantation. The quality of evidence is downgraded by indirectness (the use of surrogate endpoints).