Saxagliptin combined with additional oral antihyperglycemic agents in drug-naive diabetic patients with high glycosylated hemoglobin: a 24-week, multicenter, randomized, open-label, active parallel-controlled group clinical trial in China (SUCCESS). To assess the efficacy and safety of a dipeptidyl peptidase-4 (DPP4) inhibitor combined respectively with 3 oral antihyperglycemic agents in Chinese patients with newly diagnosed type 2 diabetes mellitus (T2DM) with high glycated hemoglobin (HbA ) levels. Between Dec 30, 2014, and Nov 1, 2017, a 24-week, multicenter, parallel-controlled study, a total of 648 drug-naive T2DM patients with 8.0%≤ HbA ≤11.0%, aged 18-80 years, and BMI 19-40 kg/m were randomly assigned 1:1:1 to receive saxagliptin combined with metformin, acarbose, or gliclazide modified