We investigated 565 renal transplants in our center. The patients were divided into 2 groups, depending on the time of surgery: group 1 (n = 228, from January 1990 to December 1995) and group 2 (n = 377, from January 1996 to December 2011). In each group, patients were divided into no diabetes mellitus (non-DM), preexisting diabetes mellitus (pre-DM), and PTDM subgroups. PTDM was defined as fasting plasma glucose ≥126 mg/dL. We started treatment by modification of lifestyle and/or antidiabetic medication