UKPDS 28: A Randomized Trial of Efficacy of Early Addition of Metformin in Sulfonylurea-Treated Type 2 Diabetes

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<jats:sec> <jats:title>OBJECTIVE</jats:title> <jats:p>To assess the efficacy over 3 years of the addition of metformin to maximum sulfonylurea therapy in type 2 diabetes.</jats:p> </jats:sec> <jats:sec> <jats:title>RESEARCH DESIGN AND METHODS</jats:title> <jats:p>This multicenter randomized open-controlled trial was conducted in outpatient diabetes clinics in 15 U.K. hospitals. A total of 591 subjects who had already been randomly allocated to sulfonylurea therapy were taking maximum doses with suboptimal glycemic control, i.e., raised fasting plasma glucose (FPG) concentrations of 6−15 mmol/l but no significant hyperglycemic symptoms. The main outcome measures included FPG, glycated hemoglobin, protocol-defined marked hyperglycemia, body weight, blood pressure, fasting plasma lipids, compliance, and hypoglycemia and other side effects.</jats:p> </jats:sec> <jats:sec> <jats:title>RESULTS</jats:title> <jats:p>After the addition of metformin, FPG concentrations decreased by mean (95% CI) −0.47 (−0.82 to −0.13) mmol/l over 3 years compared with an increase of 0.44 (0.07−0.81) mmol/l in subjects on sulfonylurea alone (P &lt; 0.00001). Median FPG concentrations at 3 years were 8.6 vs. 9.9 mmol/l, respectively (P &lt; 0.00001), and HbA1c values were 7.5 and 8.1%, respectively (P = 0.006). Adjustment for baseline BMI or FPG concentration did not affect response to therapy. Only 7% of those allocated to sulfonylurea plus metformin developed protocol-defined marked hyperglycemia compared with 36% of those allocated to sulfonylurea alone (P &lt; 0.0001). Fasting plasma lipids, body weight, and blood pressure did not change significantly. The incidence of hypoglycemic episodes did not differ between groups: 4% on sulfonylurea plus metformin and 2% on sulfonylurea alone (NS).</jats:p> </jats:sec> <jats:sec> <jats:title>CONCLUSIONS</jats:title> <jats:p>Early addition of metformin improved glycemic control in patients with suboptimal glycemic control while taking maximum sulfonylurea therapy, irrespective of obesity or baseline FPG concentrations.</jats:p> </jats:sec>

収録刊行物

  • Diabetes Care

    Diabetes Care 21 (1), 87-92, 1998-01-01

    American Diabetes Association

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