There is no consensus on the best immunosuppressive regimen in elderly people. The aim of this study will be to evaluate the efficacy of sirolimus associated with tacrolimus in elderly kidney transplant recipients. The investigators will conduct a single-center prospective randomized study comparing the combination of tacrolimus with sirolimus at reduced dose rate (tacrolimus + sirolimus group) against tacrolimus with mycophenolate (tacrolimus + mycophenolate group). The investigators will include all kidney transplant patients over 60 years of age. The investigators will evaluate estimated glomerular filtration rate and incidence of cytomegalovirus in 12 month follow-up.