JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL

Once-daily initiation with biphasic insulin aspart 30 versus insulin glargine in patients with type 2 diabetes inadequately controlled with oral drugs: an open-label, multinational RCT

Krzysztof Strojek, Wan M W Bebakar, Duma T Khutsoane, Milica Pesic, Alena Smahelová, Henrik F Thomsen, Sanjay Kalra
Current Medical Research and Opinion 2009, 25 (12): 2887-94
19821654

OBJECTIVES: To assess the efficacy and safety of biphasic insulin aspart 70/30 (BIAsp 30) and insulin glargine, administered once daily in subjects with type 2 diabetes inadequately controlled with oral anti-diabetic drugs.

RESEARCH DESIGN AND METHODS: In this 26-week, open-labeled, randomized, parallel-group, multinational, treat-to-target trial, 480 insulin-naïve subjects were randomized to receive either BIAsp 30 before dinner or insulin glargine at bedtime, both in combination with metformin and glimepiride.

TRIAL REGISTRATION: NCT00469092, ClinicalTrials.gov.

RESULTS: A total of 433 subjects completed the trial. Estimated mean reduction in HbA(1c) from baseline to end of treatment was -1.41% with BIAsp 30 and -1.25% with insulin glargine (BIAsp 30 - insulin glargine = -0.16%, 95% CI [-0.30; -0.02], p = 0.029). At the end of treatment, mean HbA(1c) was 7.1% and 7.3% for BIAsp 30 and insulin glargine, respectively. Significantly lower plasma glucose levels were observed with BIAsp 30 post-dinner (BIAsp 30 - insulin glargine = -0.52 mmol/L, 95% CI [-1.02; -0.03], p = 0.04) and at bedtime (BIAsp 30 - insulin glargine = -0.78 mmol/L, 95% CI [-1.25; -0.31], p < 0.01). The relative risk (RR) of experiencing a nocturnal hypoglycemic episode (00:00-06.00 a.m.) was significantly higher with BIAsp 30 than with insulin glargine (1.1 versus 0.5 episodes/year, RR = 2.41, 95% CI [1.34; 4.34], p = 0.003), but overall hypoglycemia rates were low. There were three major hypoglycemic episodes in each group.

CONCLUSIONS: With respect to HbA(1c), BIAsp 30 fulfilled the statistical criteria for non-inferiority and superiority to insulin glargine and, according to pre-defined criteria, the improvements in HbA(1c) are considered clinically equivalent. Subjects had an increased risk of minor nocturnal hypoglycemia with BIAsp 30. There were no differences in treatment satisfaction between the two groups.

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