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  • Title: Evaluation of the relationship between weight change and glycemic control after initiation of antidiabetic therapy in patients with type 2 diabetes using electronic medical record data.
    Author: McAdam-Marx C, Mukherjee J, Bellows BK, Unni S, Ye X, Iloeje U, Brixner DI.
    Journal: Diabetes Res Clin Pract; 2014 Mar; 103(3):402-11. PubMed ID: 24503045.
    Abstract:
    AIMS: This study evaluates the relationship between HbA1c and weight change outcomes by anti-diabetic weight-effect properties in patients newly treated for type 2 diabetes; a relationship not previously characterized. METHODS: Electronic medical records of patients with type 2 diabetes newly prescribed anti-diabetic monotherapy were assessed to identify HbA1c goal attainment [(<53 mmol/mol)] and weight change at 1-year. Anti-diabetics were categorized by weight-effect properties: weight-gain (sulfonylureas, thiazolidinediones) and weight-loss/neutral (metformin, DPP-4 inhibitors, GLP-1 agonists). Logistic regression analyses identified likelihood of attaining HbA1c goal or ≥3% weight loss by anti-diabetic category controlling for baseline characteristics. MANOVA was used to identify correlation between changes in weight and HbA1c. RESULTS: The study included 28,290 patients. Mean age ± sd was 61 years ±11.8. Baseline HbA1c was 7.4% ± 1.6 (57 mmol/mol ± 17); 67.3% were prescribed a weight-loss/neutral anti-diabetic. At 1-year, more patients in the weight-loss/neutral anti-diabetic category lost weight (≥3%) than in the weight-gain anti-diabetic category (40.4% vs. 24.2%, p<0.001) or had an HbA1c<7.0% (<53 mmol/mol) (71.1% vs. 63.8%, p<0.001). Those prescribed a weight-gain anti-diabetic were 53% less likely to lose weight and 29% less likely to be at HbA1c goal than those prescribed a weight-loss/neutral anti-diabetic (p<0.001). Weight loss and HbA1c outcomes were significantly correlated (p<0.001). CONCLUSIONS: Weight loss of ≥3% was associated with better glycemic control in patients newly treated for type 2 diabetes. Anti-diabetics associated with weight-loss/neutrality were associated with greater weight loss and HbA1c goal attainment and may facilitate efforts to co-manage weight and glycemia in the ambulatory-care setting.
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