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Premixed insulin aspart 30 vs. premixed human insulin 30/70 twice daily: a randomized trial in Type 1 and Type 2
Aim:
To compare the efficacy and safety of premixed insulin aspart (30% free and 70% protamine-bound, BIAsp 30) with human insulin premix (BHI 30) used in a twice-daily injection regimen in people with Type 1 and Type 2 diabetes.
Methods:
People with Type 1 and Type 2 diabetes (n = 294) using twice-daily insulin were randomized to a 12-week open-label comparison of BIAsp 30 and BHI 30. Efficacy was assessed by analysis of variance of 12-week data, adjusted for baseline level.
Results:
BIAsp 30 was as effective as BHI 30 based on the primary efficacy measure, HbA1c, mean difference -0.01 (90% confidence interval (CI) -0.14; 0.12) %Hb. Meal-time self-measured blood glucose increment averaged over the three main meals was significantly lower in the BIAsp 30 group than in the BHI 30 group (-0.68 (-1.20; -0.16) mmol/l; P < 0.02). Significant improvements were observed after breakfast, before lunch, after dinner and at bedtime (P < 0.02-0.05), with blood glucose around 1.0 mmol/l lower in the BIAsp 30 group. The number of major hypoglycaemic episodes with BIAsp 30 was half that with BHI 30. However, the overall risk of both minor and major hypoglycaemia did not differ significantly between treatments.
Conclusion:
Post-prandial glycaemic control was significantly improved, without increasing the risk of hypoglycaemia, and overall control was similar when people with Type 1 and Type 2 diabetes were treated on a twice-daily regimen with immediate premeal injections of BIAsp 30 compared with BHI 30.