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
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|ClinicalTrials.gov Identifier: NCT00956813|
Recruitment Status : Completed
First Posted : August 11, 2009
Results First Posted : April 4, 2017
Last Update Posted : April 4, 2017
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 or disease||Intervention/treatment||Phase|
|Breast Cancer Hot Flashes Menopausal Symptoms Unspecified Adult Solid Tumor, Protocol Specific||Dietary Supplement: flaxseed Other: placebo||Phase 3|
- 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.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||210 participants|
|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|
|Study Start Date :||October 2009|
|Actual Primary Completion Date :||October 2010|
|Actual Study Completion Date :||May 2013|
Experimental: Arm I
Patients receive oral flaxseed in the form of a bar similar to a granola bar once daily.
Dietary Supplement: flaxseed
Placebo Comparator: Arm II
Patients receive oral placebo bar once daily.
- 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.
- 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.
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
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|Study Chair:||Debra Barton, RN, PhD, AOCN, FAAN||Mayo Clinic|