제2형 당뇨병 환자에서 Metformin/Dipeptidyl Peptidase-4 저해제 병용요법과Metformin/Sulfonylurea 병용요법간의 효과에 대한 비교 연구

Objective: Treatment with sulfonylureas in combination with metformin improves glycemic control in type 2 diabetes mellitus (T2DM), but is associated with hypoglycemia and weight gain. This retrospective study aims to compare the effectiveness of dipeptidylpeptidase-4 (DPP-4) inhibitors and sulfonylureas as an add-on therapy to metformin in patients with T2DM. Methods: Data from medical records of 355 T2DM patients received therapy either DPP-4 inhibitors (DPP-4 inhibitor group) or sulfonylurea (SU group) in combination with metformin from 1 March 2009 to 30 September 2011 were retrospectively reviewed. Of total 355 patients, 231 patients were in DPP-4 inhibitor group and 124 patients were in SU group. Baseline Hemoglobin A1c (HbA1c) level in SU group was higher than DPP-4 inhibitor group with a statistically significant difference (8.6% vs. 7.8%). Comparative analysis between DPP-4 inhibitor group and SU group was performed for HbA1c values, amounts of HbA1c changes, and rates of HbA1c changes from baseline at 6-month intervals and incidence rates of major cardiocerebral events. Results: SU group showed larger HbA1c changes in both amounts and rates compared to DPP-4 inhibitor group, although statistical significance was not found in all study periods. Proportions of patients with stable HbA1c