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Pruthi S, Qin R, Terstriep SA, Liu H, Loprinzi CL, Shah TRC, Tucker KF, Dakhil SR, Bury MJ, Carolla RL, Steen PD, Vuky J, Barton DL. The evaluation of flaxseed for hot flashes: Results of a randomized, controlled trial, NCCTG study N08C7. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.18_suppl.cra9015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
CRA9015 Background: Hot flashes are a common symptom during the menopause transition or following breast cancer treatment that can negatively impact the quality of life for many women. Preliminary data have suggested that flaxseed, a rich source of dietary lignans, may be a potentially effective treatment for hot flashes. Methods: A phase III randomized, placebo controlled trial was conducted to evaluate the efficacy of flaxseed in reducing hot flashes. Postmenopausal women were randomly assigned to a flaxseed bar (providing 410 mg of lignans) for 6 weeks vs a placebo bar. Participants completed daily prospective, self report hot flash diaries during the baseline week and then began eating one study bar per day for 6 weeks, while continuing to record their daily hot flashes. The intra-patient difference in hot flash activity between baseline and the last treatment week was the primary endpoint. Side effects of the bars were evaluated through self report and CTC assessment. Results: Between October and December 2009, 188 women were enrolled onto this trial. Mean hot flash scores were reduced by 4.9 units in the flaxseed group and 3.5 in the placebo group (p=0.29). In both groups, a little over a third of the women received a 50% reduction in their hot flash scores. Only one side effect was significantly different between groups, that being grade 1 pruritis, which was more common (7%) in the placebo group versus 1% in the flaxseed group. Both groups reported increased abdominal distension, flatulence, diarrhea and nausea. Adherence and ability to detect treatment assignment did not differ between groups. Conclusions: The results of this trial do not support the use of 410 mg of flaxseed lignans for the reduction of hot flashes. The gastrointestinal side effects seen in both groups were likely due to the fiber content in the flaxseed and placebo bars.
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Affiliation(s)
- S. Pruthi
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - R. Qin
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - S. A. Terstriep
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - H. Liu
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - C. L. Loprinzi
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - T. R. C. Shah
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - K. F. Tucker
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - S. R. Dakhil
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - M. J. Bury
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - R. L. Carolla
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - P. D. Steen
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - J. Vuky
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
| | - D. L. Barton
- Mayo Clinic, Rochester, MN; Sanford Medical Center Fargo, Fargo, ND; Ann Arbor, Saginaw, MI; Ann Arbor, Warren, MI; Wichita Community Clinical Oncology Program, Wichita, KS; Cancer & Hematology Centers of Western Michigan, Grand Rapids, MI; Cancer Research for the Ozarks, Springfield, MO; Roger Maris Cancer Center, Fargo, ND; Virginia Mason Medical Center, Seattle, WV
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