Characteristics of the subjects according to combination treatment with metformin.

The data are presented as the means (SD) or n (%).*Hb<13 g/dL for men and <12 g/dL for women (WHO guidelines); BMI, body mass index; H2 blocker, histamine 2 receptor blocker; PPI, proton pump inhibitor; FBS, fasting blood sugar; TC, total cholesterol; TG, triglyceride; MCV, mean corpuscular volume; fL, femtoliter.
S+M: Metformin + Sulfonylurea; I+M: Metformin + Insulin.
Characteristics of the subjects according to combination treatment with metformin.

数据以均值（标准差，SD）或例数（百分比）呈现。*男性血红蛋白（Hb）<13 g/dL、女性<12 g/dL（参照世界卫生组织指南）；体质量指数（BMI, body mass index）；H2受体阻滞剂（H2 blocker, histamine 2 receptor blocker）；质子泵抑制剂（PPI, proton pump inhibitor）；空腹血糖（FBS, fasting blood sugar）；总胆固醇（TC, total cholesterol）；甘油三酯（TG, triglyceride）；平均红细胞体积（MCV, mean corpuscular volume）；飞升（fL, femtoliter）。
S+M：二甲双胍+磺脲类药物（Metformin + Sulfonylurea）；I+M：二甲双胍+胰岛素（Metformin + Insulin）。
基于二甲双胍联合治疗方案的受试者特征。