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Flaxseed in Treating Postmenopausal Women With Hot Flashes Who Have a History of Breast Cancer or Other Cancer or Who Do Not Wish to Take Estrogen Therapy

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00956813
First Posted: August 11, 2009
Last Update Posted: April 4, 2017
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.
Collaborator:
National Cancer Institute (NCI)
Information provided by (Responsible Party):
Alliance for Clinical Trials in Oncology
  Purpose

RATIONALE: Estrogen can relieve the symptoms of menopause, but can also cause the growth of breast cancer cells. Flaxseed may reduce the number of hot flashes and improve mood and quality of life in postmenopausal women not receiving estrogen therapy.

PURPOSE: This randomized phase III trial is studying flaxseed to see how well it works in treating postmenopausal women with hot flashes who have a history of breast cancer or other cancer or who do not wish to take estrogen therapy.


Condition Intervention Phase
Breast Cancer Hot Flashes Menopausal Symptoms Unspecified Adult Solid Tumor, Protocol Specific Dietary Supplement: flaxseed Other: placebo Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Supportive Care
Official Title: Phase III, Randomized, Placebo-controlled, Double-Blind Trial of Flaxseed for the Treatment of Hot Flashes

Resource links provided by NLM:


Further study details as provided by Alliance for Clinical Trials in Oncology:

Primary Outcome Measures:
  • To Evaluate the Efficacy of Flaxseed on Hot Flash Scores in Women as Measured by a Daily Prospective Hot Flash Diary. [ Time Frame: Baseline and 7 weeks ]

    The intra-patient difference in hot flash activity between baseline (study week 1) and treatment termination (study week 7) is the primary endpoint. The hot flash activity will be measured by the weekly average hot flash score which is a composite entity of both frequency and severity of hot flashes.

    The hot flash severities are graded from 1 to 4, ranging from mild, to moderate, to severe to very severe. The daily hot flash score is computed by multiplying the mean grade of severity by the frequency during every 24 hour period. Therefore, a score of zero is the lowest possible score and can be interpreted as having no hot flashes. The average daily hot flash score during the baseline week was compared to the average daily value during week 7.

    The primary method of analysis will be the independent sample t-test to examine the change of weekly average hot flash score from baseline to treatment termination between flaxseed and placebo arms.



Secondary Outcome Measures:
  • Toxicity as Measured by CTCAE v3.0 [ Time Frame: Up to 7 weeks ]
    Frequency and severity of adverse events were reported by patients weekly evaluated through clinical assessment by NCI CTCAE v3.0. The number of patients reporting grade 3 or higher events are reported in this outcome measure. For a full list of all events, please refer to the Adverse Events section of this report.

  • Change of Mood as Measured by the Profile of Mood States (POMS) [ Time Frame: Baseline and up to 7 weeks ]

    Profile of Mood States (POMS) was used to look at total mood disturbance as well as the subscales of tension-anxiety, fatigue-inertia, and vigor-activity. The POMS is a well known, well validated, reliable measure of psychological distress which includes 6 subscales of fatigue-inertia, vigor-activity, tension-anxiety, depression-dejection, anger-hostility, and confusion-bewilderment. The entire scale can be scored to provide a measure of total mood disturbance. The measure contains adjectives related to mood which are scored from 0 (not at all) to 4 (extremely). Individual scores were converted to a 0-100 scale where 100 is best quality of life.

    The change of mood as measured by the POMS from baseline to treatment termination between flaxseed versus placebo arms was compared using Kruskal-Wallis test. The mean change in total score for each arm is reported.


  • Change of Menopause Specific Quality of Life as Measured by the Menopause Specific Quality of Life (MENQOL) [ Time Frame: Baseline and up to 7 weeks ]
    The change in quality of life as measured by the MENQOL from baseline to treatment termination between flaxseed versus placebo arms was evaluated. On a 0-6 scale, patients were asked to answer questions in in each of 4 domain scores (Vasomotor, Psychosocial, Physical, Sexual) Scores were converted to a 0-100 scale where 100 is best QOL. The change in score from baseline to end of treatment were analyzed separately for each domain. Here we report the mean change in score for each category.

  • Change of Daily Interference as Measured by the Hot Flash Related Daily Interference Scale (HFRDIS) [ Time Frame: Baseline and up to 7 weeks ]
    The change of daily interference as measured by the HFRDIS from baseline to treatment termination between flaxseed versus placebo arms was evaluated with an independent t-test for continuous data. On a 0-10 scale, patients were asked to describe how hot flashes interfered with 10 different aspects of their life (work, social activities, leisure activities, sleep, mood, concentration, relationships with others, sexuality, enjoyment of life and overall quality of life). Scores were converted to a 0-100 scale where 100 is best QOL.The HFRDIS total score was the average of the 10 individual questions. The change in total score from baseline to end of treatment was analyzed between the groups using a Kruskal-Wallace test.


Enrollment: 210
Study Start Date: October 2009
Study Completion Date: May 2013
Primary Completion Date: October 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Arm I
Patients receive oral flaxseed in the form of a bar similar to a granola bar once daily.
Dietary Supplement: flaxseed
Given orally
Placebo Comparator: Arm II
Patients receive oral placebo bar once daily.
Other: placebo
Given orally

Detailed Description:

OBJECTIVES:

  • To evaluate the efficacy of flaxseed on hot flash scores in women with a history of breast cancer or other cancer or in women who do not wish to take estrogen therapy for fear of increased risk of breast cancer as measured by a daily prospective hot flash diary.
  • To evaluate the side effect profile of flaxseed in this population.
  • To evaluate the effects of flaxseed on mood (per the Profile of Mood States) and broader menopausal symptoms (per the MENQOL), daily interference from hot flashes (per the HFRDIS), and perception of benefit (per Global Impression of Change).

OUTLINE: Patients are stratified according to age (18-49 years vs ≥ 50 years); treatment with tamoxifen citrate, selective estrogen receptor modulators, or aromatase inhibitors (yes vs no); duration of hot flashes (≤ 9 months vs > 9 months); and daily frequency of hot flashes (4-9 vs ≥ 10). Patients are randomized to 1 of 2 treatment arms.

  • Arm I: Patients receive oral flaxseed in the form of a bar similar to a granola bar once daily.
  • Arm II: Patients receive oral placebo bar once daily. In both arms, treatment continues for 6-12 weeks. Patients in arm II may crossover to receive treatment as in arm I after 6 weeks.

Patients complete questionnaires (Hot Flash Diary, Side Effect Experience Questionnaire, Profile of Mood States, Hot Flash Related Daily Interference Scale, and Menopause Specific Quality of Life) at baseline and periodically during treatment. Patients are contacted by telephone at the end of weeks 2, 4, 5, and 7 to assess product tolerability, document compliance, encourage completion of questionnaires, and address problems.

  Eligibility

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No
Criteria
  • Bothersome hot flashes, defined by their occurrence ≥ 28 times per week and of sufficient severity to make the patient desire therapeutic intervention

    • Presence of hot flashes for ≥ 1 month
  • Meets 1 of the following criteria:

    • History of breast cancer or other cancer (currently without malignant disease)
    • No history of breast cancer and wishes to avoid estrogen due to a perceived increased risk of breast cancer
  • Hormone receptor status not specified
  • Postmenopausal as defined by 1 of the following*:

NOTE: *Women with ≥ 1 ovary but without a uterus should be deemed postmenopausal by either age > 55 OR a combination of estrogen within a postmenopausal range (per local lab) and follicle-stimulating hormone > 40 mIU/mL

  • Absence of a period in the past 12 months
  • Bilateral oophorectomy

    • ECOG performance status 0-1
    • Life expectancy ≥ 6 months
    • Able to complete questionnaire(s) alone or with assistance
    • No diabetes requiring oral or injectable antihyperglycemics
    • No hypotension
    • No history of allergic or other adverse reaction to flaxseed
    • No irritable bowel syndrome, colitis, Crohn disease, or any gastrointestinal condition where the patient should not consume and/or has an intolerance/allergies to seeds or nuts
    • At least 4 weeks since prior and no concurrent or planned androgens, estrogens, or progestational agents
  • Tamoxifen, raloxifene, or aromatase inhibitors are allowed provided the patient has been on a constant dose for ≥ 4 weeks and is not expected to stop the medication during study treatment

    • At least 4 weeks since prior and no concurrent anti-cancer therapies of any kind

  • Trastuzumab allowed

    • No concurrent treatment with other anti-cancer therapies of any kind except for trastuzumab or endocrine therapies
    • No concurrent (≤ 7 days prior to registration) or planned use of other agents for treating hot flashes (i.e., gabapentin, clonidine, antidepressants, estrogen treatment, megestrol acetate, or Bellergal)
  • Stable dose of vitamin E (as a general vitamin supplement) allowed provided it is ≤ 800 IU/day, it was started > 30 days before study initiation, and is to be continued through study period
  • Patients who have been using antidepressants for mood and have been on a stable dose for over a month and meet the eligibility criteria for hot flash frequency and duration are eligible

    • No concurrent anticoagulants or anti-platelets (1 mg of Coumadin for central line patency allowed)

  • Aspirin allowed (≤ 81 mg)

    • No concurrent anti-hypertensives
    • No other concurrent herbal supplements for any reason, including soy and soy supplements (i.e., powders, pills, or milk)
  Contacts and Locations
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 ClinicalTrials.gov identifier (NCT number): NCT00956813


  Show 107 Study Locations
Sponsors and Collaborators
Alliance for Clinical Trials in Oncology
National Cancer Institute (NCI)
Investigators
Study Chair: Debra Barton, RN, PhD, AOCN, FAAN Mayo Clinic
  More Information

Publications:
Responsible Party: Alliance for Clinical Trials in Oncology
ClinicalTrials.gov Identifier: NCT00956813     History of Changes
Other Study ID Numbers: N08C7
NCCTG-N08C7
CDR0000644811 ( Registry Identifier: PDQ (Physician Data Query) )
NCI-2011-01928 ( Registry Identifier: CTRP (Clinical Trials Reporting System) )
First Submitted: August 8, 2009
First Posted: August 11, 2009
Results First Submitted: November 29, 2016
Results First Posted: April 4, 2017
Last Update Posted: April 4, 2017
Last Verified: February 2017

Keywords provided by Alliance for Clinical Trials in Oncology:
menopausal symptoms
hot flashes
breast cancer
unspecified adult solid tumor, protocol specific

Additional relevant MeSH terms:
Breast Neoplasms
Hot Flashes
Neoplasms by Site
Neoplasms
Breast Diseases
Skin Diseases
Signs and Symptoms