Clinical trial NCT00003098: Diet and Estrogen Metabolism in Postmenopausal Women
Official title: Diet and Estrogen Metabolism in Postmenopausal Women
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Breast Cancer
Keywords: breast cancer
Lead sponsor: Jonsson Comprehensive Cancer Center
Sponsor class: OTHER
Collaborators: name: National Cancer Institute (NCI)
First posted: 2004-05-24
Enrollment: 12
Sex: FEMALE
Minimum age (years): 50
Maximum age (years): 69
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: RATIONALE: The amount of dietary fat or fiber may affect estrogen metabolism in postmenopausal women, and this may affect the risk of developing cancer.

PURPOSE: Randomized dietary intervention to study the effectiveness of a low-fat diet combined with either high fiber or low fiber on estrogen metabolism in healthy postmenopausal women.

Detailed description: OBJECTIVES: I. Determine the effect of a low fat diet combined with either high fiber (25-35 grams per day) or low fiber (10-15 grams per day) intake on estrogen metabolism in healthy postmenopausal women.

OUTLINE: This is a randomized study. Patients are randomized to one of 2 arms (dietary fat reduction with and without increased fiber). All patient must successfully complete a dietary run-in phase for 4 weeks before randomization. During the run-in phase, patients are asked to maintain a food record for days 7-14. Patients undergo radioisotopic infusion study of sex steroid metabolism on days 14, 21, and 28. Patients are given 3 prepackaged meals a day for 12 weeks. Patients must maintain a record of all food eaten and return all food containers to the center for documentation. Patients undergo radioisotopic infusion study of sex steroid metabolism on days 70, 77, and 84. At the end of the 12 weeks, patients meet with the dietitian for 30 minutes to receive instructions on maintaining a low fat, high fiber diet for the second phase of the study.

PROJECTED ACCRUAL: 40 women will be accrued over 4 years.

Eligibility criteria: DISEASE CHARACTERISTICS: Healthy postmenopausal female between the ages of 50 and 69 with diet of greater than 32% of total calories from fat and less than 15 grams of fiber

PATIENT CHARACTERISTICS: Age: 50 to 69 Sex: Female Performance status: Not specified Life expectancy: Not specified Hematopoietic: Not specified Hepatic: Not specified Renal: Not specified Other: At least 2 years since menopause In general good health Increased body fat (125%-175% of ideal body weight) Increased upper body fat (waist-to-hip circumference ratio greater than 0.85) Serum estradiol greater than 13 picograms per milliliter

PRIOR CONCURRENT THERAPY: No concurrent medication that can interfere with blood test results No hormone replacement therapy or thyroid hormones

Primary outcomes:
Secondary outcomes:
Other outcomes:
Locations:
city: Los Angeles
country: United States
facility: Jonsson Comprehensive Cancer Center, UCLA
state: California
Study officials:
affiliation: Jonsson Comprehensive Cancer Center
name: David Heber, MD
role: STUDY_CHAIR
References: