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  • Title: Long-term efficacy and safety of sitagliptin in the treatment of Japanese Type 2 diabetes (ASSET-K1) to a target of HbA1c <7%.
    Author: Maeda H, Kubota A, Kanamori A, Tanaka Y, Terauchi Y, Matsuba I, ASSET-K Study Group.
    Journal: J Endocrinol Invest; 2013 Sep; 36(8):568-73. PubMed ID: 23385888.
    Abstract:
    BACKGROUND: Few studies have investigated the factors related to improvement and maintenance of glycemic control with sitagliptin in Type 2 diabetes (T2D) patients. AIM: To identify factors contributing to reaching and maintaining glycated hemoglobin (HbA1c) <7% with sitagliptin in Japanese T2D patients. SUBJECTS AND METHODS: This study included 1327 patients who were: taking sitagliptin as monotherapy; switched to sitagliptin; or taking sitagliptin in combination therapy. At baseline and 1, 3, 6, and 12 months after starting sitagliptin, weight, body mass index (BMI), HbA1c, fasting plasma glucose (FPG), and post-prandial plasma glucose (PPG) were measured. The subjects were divided into a group that achieved HbA1c<7% at 12 months, a poor control group (HbA1c≥8% at 12 months), and a discontinued group. Multiple regression analysis was performed to identify factors contributing to long-term control and maintenance with sitagliptin treatment. RESULTS: HbA1c decreased significantly from 8.0% at baseline to 7.3%, but weight was unchanged. FPG and PPG improved significantly. The HbA1c<7% group had a significantly higher age and a signifi cant ly lower BMI at baseline than the HbA1c≥8% group and the discontinued group. On multivariate regression analysis, baseline HbA1c, baseline BMI, and Δbody weight after 12 months were significantly related to HbA1c reduction. The most common adverse event was hypoglycemia, and the most common adverse event responsible for discontinuation was constipation. CONCLUSIONS: HbA1c<7.0% was achieved in 31% of T2D patients who had poor control with conventional treatment. Weight management is important for maintaining good long-term control with sitagliptin.
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