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EPAT: Estrogen in the Prevention of Atherosclerosis Trial

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00115024
Recruitment Status : Completed
First Posted : June 21, 2005
Last Update Posted : December 11, 2009
Mead Johnson Nutrition
Information provided by:
National Institute on Aging (NIA)

Brief Summary:
The purpose of this study is to determine the effects of estrogen replacement therapy (ERT) on the progression of early atherosclerosis in healthy postmenopausal women without preexisting cardiovascular disease (CVD).

Condition or disease Intervention/treatment Phase
Atherosclerosis Postmenopause Drug: Micronized 17B-estradiol Phase 2 Phase 3

Detailed Description:

The primary goal of this randomized, controlled trial is to determine if ERT stabilizes, retards, and/or reverses the progression of atherosclerosis in postmenopausal women. We will further evaluate the association of lipid and non-lipid factors of ERT-mediated reduction in the progression of early atherosclerosis. Ultrasonography will be used to measure the rate of change in the thickness of the carotid artery. Blood samples will be used for measuring lipid and non-lipid mediators of ERT.

A total of 222 healthy postmenopausal women 46 to 80 years old without CVD symptoms will be randomized to receive either micronized 17B-estradiol (Estrace) 1mg/day, or a matching placebo tablet daily. All women will be on a low fat/low cholesterol diet, and will receive pravastatin if their LDL cholesterol level exceeds 160 mg/dL. Participants will undergo ultrasonography at baseline and every 6 months throughout the 2 years of randomized treatment. Measurements of lipid and non-lipid biochemical markers will also be done at baseline and every 6 months.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 222 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Prevention
Official Title: Estrogen in the Prevention of Atherosclerosis Trial
Study Start Date : April 1994
Actual Primary Completion Date : November 1998
Actual Study Completion Date : November 1998

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Atherosclerosis

Primary Outcome Measures :
  1. rate of change of distal common carotid artery (CCA) far wall intima-media thickness (IMT)

Secondary Outcome Measures :
  1. lipid and non-lipid factors

Information from the National Library of Medicine

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Ages Eligible for Study:   46 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Postmenopausal female (serum estradiol less than 20 pg/ml)
  • 46 to 80 years old
  • Fasting LDL-C levels 130 to 210 mg/dL
  • Triglyceride levels less than 400 mg/dL
  • Current non-smoker

Exclusion Criteria:

  • Clinical evidence of cardiovascular disease
  • HDL-C level less than 30 mg/dL
  • Fasting blood glucose greater than 200 mg/dL
  • Previous hormonal replacement therapy (non-contraceptive) over 10 years duration and/or current use within 1 month
  • Uncontrolled hypertension
  • Untreated thyroid disease
  • Renal insufficiency
  • Clinical evidence of congestive heart failure
  • Life threatening disease with prognosis less than 5 years
  • Alcohol intake greater than 5 drinks per day (1 drink = 1 1/2 oz distilled spirits, 4 oz wine, or 12 oz beer) or substance abuse (intravenous drug abuse, cocaine use)
  • History of estrogen dependent cancer or detected at screening or any other disorder precluding use of ERT
  • Hot flashes greater than 5 per day which interfere with daily activity and preclude randomization to placebo.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00115024

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United States, California
Atherosclerosis Research Unit, Division of Cardiovascular Medicine, Department of Medicine
Los Angeles, California, United States, 90033
Sponsors and Collaborators
National Institute on Aging (NIA)
Mead Johnson Nutrition
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Principal Investigator: Howard N. Hodis, MD University of Southern California, Atherosclerosis Research Unit, Division of Cardiovascular Medicine, Department of Medicine

Publications of Results:
Publications automatically indexed to this study by Identifier (NCT Number):
Layout table for additonal information Identifier: NCT00115024     History of Changes
Other Study ID Numbers: AG0026
R01AG018798 ( U.S. NIH Grant/Contract )
First Posted: June 21, 2005    Key Record Dates
Last Update Posted: December 11, 2009
Last Verified: June 2005
Keywords provided by National Institute on Aging (NIA):
cardiovascular disease
Additional relevant MeSH terms:
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Arterial Occlusive Diseases
Vascular Diseases
Cardiovascular Diseases
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs