Efficacy and safety of patient-directed titration of once-daily pre-dinner premixed biphasic insulin aspart 70/30 injection in Japanese type2 diabetic patients with oral antidiabetic drug failure: STEP-AKITA study

Abstract

Aims/Introduction: To clarify clinical characteristics related to optimal glycemic control achieved after adding once-daily pre-dinner biphasic insulin aspart 70/30 (BIAsp 30) in Japanese type2 diabetic (T2D) patients with oral antidiabetic drug (OAD) failure. Materials and Methods: Under this regimen, we evaluated changes in HbA1c levels and daily self-monitoring blood glucose (BG) profiles, as well as the incidences of hypoglycemia and retinopathy progression. The patients adjusted BIAsp 30 dosages themselves every 3-4days according to a pre-determined algorithm to achieve fasting BG levels of 101-120mg/dL. HbA1c levels were expressed as Japan Diabetes Society values. Results: Of 29 enrolled patients, 22 (HbA1c levels, 8.5±1.5% [mean±SD]) and 20 patients completed the 16- and 24-week follow-up, respectively. At 16weeks 68.2 and 45.5%, and at 24weeks 80.0 and 35% of patients had achieved HbA1c levels of <7.0 and <6.5%, respectively. The patients who had achieved optimal glycemic control, including daytime postprandial BG profiles after treatment, had lower post-breakfast BG excursions at baseline, shorter diabetes durations and younger age. No severe hypoglycemic episodes were recorded. Progression of retinopathy was observed in 3 of the 29 enrolled patients. Conclusions: Lower post-breakfast BG excursions, shorter diabetes duration and younger age in Japanese T2D patients with OAD failure might warrant optimal glycemic control with safety after adding once-daily pre-dinner BIAsp 30 initiating regimen. © 2010 Asian Association for the Study of Diabetes and Blackwell Publishing Asia Pty Ltd.