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    Low-Fat Dietary Pattern and Breast Cancer Mortality in the Women’s Health Initiative Randomized Controlled Trial

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    Author
    Chlebowski, Rowan T.
    Aragaki, Aaron K.
    Anderson, Garnet L.
    Thomson, Cynthia A.
    Manson, JoAnn E.
    Simon, Michael S.
    Howard, Barbara V.
    Rohan, Thomas E.
    Snetselar, Linda
    Lane, Dorothy
    Barrington, Wendy
    Vitolins, Mara Z.
    Womack, Catherine
    Qi, Lihong
    Hou, Lifang
    Thomas, Fridtjof
    Prentice, Ross L.
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    Affiliation
    Univ Arizona, Canc Ctr
    Issue Date
    2017-09
    
    Metadata
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    Publisher
    AMER SOC CLINICAL ONCOLOGY
    Citation
    Low-Fat Dietary Pattern and Breast Cancer Mortality in the Women’s Health Initiative Randomized Controlled Trial 2017, 35 (25):2919 Journal of Clinical Oncology
    Journal
    Journal of Clinical Oncology
    Rights
    Copyright © 2017 American Society of Clinical Oncology. All rights reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Purpose Earlier Women's Health Initiative Dietary Modification trial findings suggested that a low-fat eating pattern may reduce breast cancers with greater mortality. Therefore, as a primary outcome-related analysis from a randomized prevention trial, we examined the long-term influence of this intervention on deaths as a result of and after breast cancer during 8.5 years (median) of dietary intervention and cumulatively for all breast cancers diagnosed during 16.1 years (median) of follow-up. Patients and Methods The trial randomly assigned 48,835 postmenopausal women with normal mammograms and without prior breast cancer from 1993 to 1998 at 40 US clinical centers to a dietary intervention with goals of a reduction of fat intake to 20% of energy and an increased intake of fruits, vegetables, and grains (40%; n = 19,541) or to a usual diet comparison (60%; n = 29,294). Results In the dietary group, fat intake and body weight decreased (all P < .001). During the 8.5-year dietary intervention, with 1,764 incident breast cancers, fewer deaths occurred as a result of breast cancer in the dietary group, which was not statistically significant (27 deaths [0.016% per year] v 61 deaths [0.024% per year]; hazard ratio [HR], 0.67; 95% CI, 0.43 to 1.06; P = .08). During the same period, deaths after breast cancer (n = 134) were significantly reduced (40 deaths [0.025% per year] v 94 deaths [0.038% per year]; HR, 0.65; 95% CI, 0.45 to 0.94; P = .02) by the dietary intervention. During the 16.1-year follow-up, with 3,030 incident breast cancers, deaths after breast cancer also were significantly reduced (234 deaths [0.085% per year] v 443 deaths [0.11% per year]; HR, 0.82; 95% CI, 0.70 to 0.96; P = .01) in the dietary group. Conclusion Compared with a usual diet comparison group, a low-fat dietary pattern led to a lower incidence of deaths after breast cancer. (C) 2017 by American Society of Clinical Oncology
    Note
    6 month embargo; Published online: June 27, 2017.
    ISSN
    0732-183X
    1527-7755
    PubMed ID
    28654363
    DOI
    10.1200/JCO.2016.72.0326
    Version
    Final published version
    Sponsors
    National Heart, Lung, and Blood Institute [N01WH22110, 24152, 32100-2, 32105-6, 32108-9, 32111-13, 32115, 32118-32119, 32122, 42107-26, 42129-32, 44221]; American Institute for Cancer Research Grant [30210-01]; National Cancer Institute Grant [UM1CA173642]
    Additional Links
    http://ascopubs.org/doi/10.1200/JCO.2016.72.0326
    ae974a485f413a2113503eed53cd6c53
    10.1200/JCO.2016.72.0326
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