Diabetes Care 28:254-259, 2005
© 2005 by the American Diabetes Association, Inc.
Clinical Care/Education/Nutrition Original Article |
Comparison of Basal Insulin Added to Oral Agents Versus Twice-Daily Premixed Insulin as Initial Insulin Therapy for Type 2 Diabetes
Hans U. Janka, MD1,
Gerd Plewe, MD1,
Matthew C. Riddle, MD2,
Christine Kliebe-Frisch, PHD3,
Matthias A. Schweitzer, MD3 and
Hannele Yki-Järvinen, MD4
1 Zentralkrankenhaus, Bremen-Nord, Bremen, Germany
2 Division of Endocrinology, Diabetes, and Clinical Nutrition, Oregon Health and Science University, Portland, Oregon
3 Aventis Pharma Deutschland, Bad Soden, Germany
4 Department of Medicine, University of Helsinki, Helsinki, Finland
Address correspondence and reprint requests to Prof. Hans U. Janka, Zentralkrankenhaus, Bremen-Nord, II Medizinische Abteilung, Hammersbecker Str. 228, 28755 Bremen, Germany. E-mail: hans.janka{at}klinikum-bremen-nord.de
OBJECTIVETo compare the efficacy and safety of adding once-daily basal insulin versus switching to twice-daily premixed insulin in type 2 diabetic patients insufficiently controlled by oral antidiabetic agents (OADs).
RESEARCH DESIGN AND METHODSIn a 24-week, multinational, multicenter, open, parallel group clinical trial, 371 insulin-naïve patients with poor glycemic control (fasting blood glucose [FBG] 120 mg/dl, HbA1c 7.510.5%) on OADs (sulfonylurea plus metformin) were randomized to once-daily morning insulin glargine plus glimepiride and metformin (glargine plus OAD) or to 30% regular/70% human NPH insulin (70/30) twice daily without OADs. Insulin dosage was titrated to target FBG 100 mg/dl (both insulins) and predinner blood glucose 100 mg/dl (70/30 only) using a weekly forced-titration algorithm.
RESULTSMean HbA1c decrease from baseline was significantly more pronounced (1.64 vs. 1.31%, P = 0.0003), and more patients reached HbA1c 7.0% without confirmed nocturnal hypoglycemia (45.5 vs. 28.6%, P = 0.0013) with glargine plus OAD than with 70/30. Similarly, FBG decrease was greater with glargine plus OAD (adjusted mean difference 17 mg/dl [0.9 mmol/l], P < 0.0001), and more patients reached target FBG 100 mg/dl with glargine plus OAD than with 70/30 (31.6 vs. 15.0%, P = 0.0001). Glargine plus OAD patients had fewer confirmed hypoglycemic episodes than 70/30 patients (mean 4.07 vs. 9.87/patient-year, P < 0.0001).
CONCLUSIONSInitiating insulin treatment by adding basal insulin glargine once daily to glimepiride plus metformin treatment was safer and more effective than beginning twice-daily injections of 70/30 and discontinuing OADs in type 2 diabetic patients inadequately controlled with OADs.
Abbreviations: FBG, fasting blood glucose OAD, oral antidiabetic agent

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Copyright © 2005 by the American Diabetes Association.
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