A direct efficacy and safety comparison of insulin aspart, human soluble insulin, and human premix insulin (70/30) in patients with type 2 diabetes.
OBJECTIVE
Because there are limited data on the comparison of insulin aspart and mixed insulin in type 2 diabetes, this trial was performed to compare the efficacy and safety of preprandial insulin aspart with human soluble insulin (HI) and human premix (70% NPH/30% regular) insulin (MIX).


METHODS
A total of 231 type 2 diabetic patients were randomized to insulin aspart (n = 75), HI (n = 80), or MIX (n = 76) for 3 months. Insulin aspart and HI were administered with or without bedtime NPH insulin. A total of 204 patients completed the trial according to protocol. HbA1c, 7-point blood glucose, insulin dosage, and hypoglycemic episodes were recorded. The primary end point was "change of HbA1c" from baseline to last visit. Analysis for equivalence was performed by t tests with three subtests.


RESULTS
HbA1c decreased 0.91 +/- 1.00 for insulin aspart, 0.73 +/- 0.87 for HI, and 0.65 +/- 1.10 for MIX with the following confidence intervals: insulin aspart HI (-0.21 to 0.57, P = 0.025), insulin aspart MIX (-0.17 to 0.69, P = 0.092), and HI-MIX (-0.33 to 0.48, P = 0.006). Postprandial blood glucose decreased in the insulin aspart group: 0.44 mmol/l to >1.67 mmol/l compared with HI and 1.1 mmol/l to >1.67 mmol/l compared with MIX. Preprandial insulin doses were similar in the insulin aspart and HI groups (10-14.5 U). Hypoglycemic events per month were 0.56 HI, 0.40 insulin aspart, and 0.19 MIX.


CONCLUSIONS
Statistically, insulin aspart was not equivalent to another treatment in terms of HbA1c reduction. Insulin aspart treatment resulted in improved HbA1c and postprandial blood glucose. The application of insulin aspart was safe and well tolerated.
Bretzel
Reinhard G
RG
Third Medical Department Justus-Liebig University, Giessen, Germany. reinhard.bretzel@innere.med.uni-giessen.de
Arnolds
Sabine
S
Medding
Jürgen
J
Linn
Thomas
T
D001786:Blood Glucose / Q000378:metabolism; D015992:Body Mass Index; D001835:Body Weight; D003924:Diabetes Mellitus, Type 2 / Q000097:blood / Q000188:drug therapy*; D005260:Female; D006442:Glycated Hemoglobin / Q000032:analysis; D006801:Humans; D007004:Hypoglycemic Agents / Q000627:therapeutic use*; D007328:Insulin / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use*; D061267:Insulin Aspart; D008297:Male; D008875:Middle Aged; D019518:Postprandial Period; D015203:Reproducibility of Results; D012449:Safety
D001786:Blood Glucose; D006442:Glycated Hemoglobin; D007004:Hypoglycemic Agents; D007328:Insulin; D061267:Insulin Aspart