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A correction has been published: N Engl J Med 2007;356(13):1387.

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Volume 355:2427-2443 December 7, 2006 Number 23
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Glycemic Durability of Rosiglitazone, Metformin, or Glyburide Monotherapy
Steven E. Kahn, M.B., Ch.B., Steven M. Haffner, M.D., Mark A. Heise, Ph.D., William H. Herman, M.D., M.P.H., Rury R. Holman, F.R.C.P., Nigel P. Jones, M.A., Barbara G. Kravitz, M.S., John M. Lachin, Sc.D., M. Colleen O'Neill, B.Sc., Bernard Zinman, M.D., F.R.C.P.C., Giancarlo Viberti, M.D., F.R.C.P., for the ADOPT Study Group

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ABSTRACT

Background The efficacy of thiazolidinediones, as compared with other oral glucose-lowering medications, in maintaining long-term glycemic control in type 2 diabetes is not known.

Methods We evaluated rosiglitazone, metformin, and glyburide as initial treatment for recently diagnosed type 2 diabetes in a double-blind, randomized, controlled clinical trial involving 4360 patients. The patients were treated for a median of 4.0 years. The primary outcome was the time to monotherapy failure, which was defined as a confirmed level of fasting plasma glucose of more than 180 mg per deciliter (10.0 mmol per liter), for rosiglitazone, as compared with metformin or glyburide. Prespecified secondary outcomes were levels of fasting plasma glucose and glycated hemoglobin, insulin sensitivity, and beta-cell function.

Results Kaplan–Meier analysis showed a cumulative incidence of monotherapy failure at 5 years of 15% with rosiglitazone, 21% with metformin, and 34% with glyburide. This represents a risk reduction of 32% for rosiglitazone, as compared with metformin, and 63%, as compared with glyburide (P<0.001 for both comparisons). The difference in the durability of the treatment effect was greater between rosiglitazone and glyburide than between rosiglitazone and metformin. Glyburide was associated with a lower risk of cardiovascular events (including congestive heart failure) than was rosiglitazone (P<0.05), and the risk associated with metformin was similar to that with rosiglitazone. Rosiglitazone was associated with more weight gain and edema than either metformin or glyburide but with fewer gastrointestinal events than metformin and with less hypoglycemia than glyburide (P<0.001 for all comparisons).

Conclusions The potential risks and benefits, the profile of adverse events, and the costs of these three drugs should all be considered to help inform the choice of pharmacotherapy for patients with type 2 diabetes. (ClinicalTrials.gov number, NCT00279045 [ClinicalTrials.gov] .)


Source Information

From the Veterans Affairs Puget Sound Health Care System and University of Washington, Seattle (S.E.K.); University of Texas Health Science Center at San Antonio, San Antonio (S.M.H.); GlaxoSmithKline, King of Prussia, PA (M.A.H., B.G.K., M.C.O.), and Harlow, Essex, United Kingdom (N.P.J.); University of Michigan, Ann Arbor (W.H.H.); Oxford Centre for Diabetes, Endocrinology, and Metabolism, Oxford, United Kingdom (R.R.H.); the Biostatistics Center, George Washington University, Rockville, MD (J.M.L.); Samuel Lunenfeld Research Institute, Mount Sinai Hospital and University of Toronto, Toronto (B.Z.); and King's College London School of Medicine, University of London, London (G.V.).

This article was published at www.nejm.org on December 4, 2006.

Address reprint requests to Dr. Kahn at the Veterans Affairs Puget Sound Health Care System, 1660 S. Columbian Way, Seattle, WA 98108, or at skahn{at}u.washington.edu.

Full Text of this Article


Related Letters:

Glycemic Durability of Monotherapy for Diabetes
Rathmann W., Kostev K., Haastert B., Parashar A., Varma A., Garg R., Gandhi G. Y., Montori V. M., Kahn S. E., Viberti G., the ADOPT Steering Committee
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N Engl J Med 2007; 356:1378-1380, Mar 29, 2007. Correspondence

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