Objectives: Demonstrate the correlation of KDPI values with the data related to the function of kidney tract and to examine whether the donor characteristics affect the renal function of transplanted kidney Study design: The study is structured as a cross-sectional study Participants and methods: The study included 59 patients who attended regular checkups after renal transplantation at the ‘KBC Osijek’ Institute of Nephrology. The data on recipients were collected from history of the disease, and on donors from the Eurotransplant base. Results: The median age of the recipient was 52 years, ranging from 46 to 60. In the donor group there were 5 (9 %) with KDPI < 20 %, 45 (76 %) of donors with KDPI 20 – 85 % and 9 (15 %) with a KDPI value greater than 85%. The data shows significantly lower creatinine values, in all observed months, in recipients receiving kidney with a KDPI value of ≤ 85 %. In these recipients, the value of creatinine clearance after 30 months was significantly higher in relation to recipients receiving kidney donors whose KDPI > 85% (Kruskal Wallis test, P = 0,001). Characteristics of the donor such as age, hypertension and cause of death affect the function of the transplant. Sex, creatine and body mass index of the donor did not affect the function of the transplant. Conclusion: Patients who received a renal transplant from the donor group with lower KDPI values (≤ 85%) had better renal function when observing creatinine and creatinine clearance compared to those who received a renal transplant from the donor group with higher KDPI values (> 85%).