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7 January 2003 | Volume 138 Issue 1 | Pages 1-9
Background: Randomized trials of postmenopausal hormone therapy have found differing effects on fasting glucose levels. No trial has evaluated the effect of hormone therapy on diabetes incidence.
Objective: To evaluate the effect of hormone therapy on fasting glucose level and incident diabetes.
Design: Randomized, double-blind, placebo-controlled trial.
Setting: 20 U.S. clinical centers.
Participants: 2763 postmenopausal women with coronary heart disease who were followed for 4.1 years. At baseline, 734 women had diabetes, 218 women had impaired fasting glucose, and 1811 women were normoglycemic; the 2029 women without diabetes were followed for incident diabetes.
Intervention: 0.625 mg of conjugated estrogen plus 2.5 mg of medroxyprogesterone acetate daily, or placebo.
Measurements: Fasting glucose level was measured at baseline, at year 1, and at the end of the trial. Incident diabetes was defined by self-report of diabetes or disease complication, fasting glucose level of 6.9 mmol/L or greater (
Results: Fasting glucose levels increased significantly among women assigned to placebo but did not change among women receiving hormone therapy. The incidence of diabetes was 6.2% in the hormone therapy group and 9.5% in the placebo group (relative hazard, 0.65 [95% CI, 0.48 to 0.89]; P = 0.006). The number needed to treat for benefit to prevent one case of diabetes was 30 (CI, 18 to 103). Changes in weight and waist circumference did not mediate this effect.
Conclusions: In women with coronary disease, hormone therapy reduced the incidence of diabetes by 35%. This observation provides important insights into the metabolic effects of postmenopausal hormones but is insufficient to recommend the use of hormones for secondary prevention of heart disease.
Editors' Notes
Context
Contribution
Implications
–The Editors
Author and Article Information
From University of California, San Francisco, San Francisco, and University of California, San Diego, La Jolla, California; Wake Forest University School of Medicine, Winston-Salem, North Carolina; University of Alabama at Birmingham, Birmingham, Alabama; and University of Pittsburgh, Pittsburgh, Pennsylvania.
Acknowledgments: The authors thank members of the HERS Coordinating Center and the Executive Committee for their review and recommended revisions. They also thank Dr. Ira D. Goldfine for recommended revisions.
Grant Support: In part by the Department of Health and Human Services (Faculty Development in General Internal Medicine grant 1D08PE50109-01). The Heart and Estrogen/progestin Replacement Study is funded by Wyeth-Ayerst Research.
Potential Financial Conflicts of Interest:Consultancies: J.A. Cauley; Honoraria: D. Herrington, J.A. Cauley; Grants Received: D. Herrington, D. Grady, V. Bittner, J.A. Cauley, E. Barrett-Connor; Grants Pending: J.A. Cauley; Other: E. Vittinghoff, F. Lin.
Requests for Single Reprints: Alka M. Kanaya, MD, Division of General Internal Medicine, University of California, San Francisco, 1701 Divisadero Street, Suite 536, San Francisco, CA 94143-1732; e-mail, alkak{at}itsa.ucsf.edu.
Current Author Addresses: Dr. Kanaya: Division of General Internal Medicine, University of California, San Francisco, 1701 Divisadero Street, Suite 536, San Francisco, CA 94143-1732.
Dr. Herrington: Wake Forest University School of Medicine, One Medical Center Boulevard, Winston-Salem, NC 27157-1066.
Drs. Vittinghoff and Grady and Ms. Lin: Prevention Sciences Group, 74 New Montgomery Street, Suite 600, San Francisco, CA 94105.
Dr. Bittner: University of Alabama at Birmingham, UAB Station—LHRB 310, Birmingham, AL 35294.
Dr. Cauley: University of Pittsburgh, 130 DeSoto Street, A524, Pittsburgh, PA 15261.
Dr. Barrett-Connor: Department of Family and Preventive Medicine, University of California, San Diego, 9500 Gilman Drive, Stein Clinical Research Building, La Jolla, CA 92093-0607.
Author Contributions Conception and design: A.M. Kanaya, D. Grady, E. Barrett-Connor.
Analysis and interpretation of the data: A.M. Kanaya, D. Herrington, E. Vittinghoff, V. Bittner.
Drafting of the article: A.M. Kanaya, E. Vittinghoff.
Critical revision of the article for important intellectual content: A.M. Kanaya, D. Herrington, E. Vittinghoff, D. Grady, V. Bittner, J.A. Cauley, E. Barrett-Connor.
Final approval of the article: A.M. Kanaya, D. Herrington, E. Vittinghoff, F. Lin, D. Grady, V. Bittner, J.A. Cauley, E. Barrett-Connor.
Provision of study materials or patients: D. Herrington, F. Lin, D. Grady, J.A. Cauley, E. Barrett-Connor.
Statistical expertise: E. Vittinghoff.
Obtaining of funding: A.M. Kanaya, D. Grady, E. Barrett-Connor.
Administrative, technical, or logistic support: A.M. Kanaya, D. Grady.
Collection and assembly of data: A.M. Kanaya, D. Grady, J.A. Cauley, E. Barrett-Connor. ARTICLE
Glycemic Effects of Postmenopausal Hormone Therapy: The Heart and Estrogen/progestin Replacement Study: A Randomized, Double-Blind, Placebo-Controlled Trial
126 mg/dL), or initiation of therapy with diabetes medication.
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