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Effect of metformin on glycaemic control in type 2 diabetes in daily practice: a retrospective study
A M Stades1, J T Heikens, F Holleman
1Department of Internal Medicine, Diakonessenhuis, Utrecht, The Netherlands. astades@diakhuis.nl
Introduction:
Recently the UKPDS study revealed the potency of metformin therapy in obese type 2 diabetic patients. A retrospective study was performed to assess the efficacy of metformin therapy in improving metabolic control in everyday practice.
Patients And Methods:
Type 2 diabetic patients were included if they met the following criteria: metformin had been added when the previous treatment failed to optimise glycaemic control expressed in HbA1c level; duration of metformin therapy had to be at least six months. Efficacy of metformin therapy, expressed as a decrease in HbA1c, was measured with a median follow-up of 32 (range 6-60) months. Variables were analysed using a paired t-test.
Results:
One hundred and sixty-three patients were treated with metformin. 98 patients were excluded, because of absence of an HbA1c value prior to treatment with metformin mainly (n = 78). The mean HbA1c of included patients had decreased 1.4% (p < 0.001) after 6 months (n = 65), 1.6% (p < 0.001) after 24 months (n = 45) and 1.5 (p < 0.001) after 36 months (n = 28). During follow-up there was no significant weight gain or loss.
Conclusion:
Metformin can be considered an effective treatment to improve glycaemic control in obese type 2 diabetic patients.