- Patients with Type 2 Diabetes (drug-naïve or on antidiabetic therapy) and documented severe renal insufficiency - CKD4 - defined by an estimated glomerular filtration rate (eGFR) equation (based on the 4 variable modification of diet in renal disease (MDRD) equation) of ≥15 and <30 mL/min/1.73 m2.