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Alcohol consumption and survival after breast cancer diagnosis in Japanese women: A prospective patient cohort study

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  • Yuko Minami
  • Seiki Kanemura
  • Masaaki Kawai
  • Yoshikazu Nishino
  • Hiroshi Tada
  • Minoru Miyashita
  • Takanori Ishida
  • Yoichiro Kakugawa

Abstract

Background: It is unclear whether alcohol consumption may impact survival after breast cancer diagnosis. To clarify the association between pretreatment alcohol consumption and survival in breast cancer patients, a prospective patient cohort study was conducted. Methods: The cohort comprised 1,420 breast cancer patients diagnosed during 1997–2013 at a single institute in Japan. Alcohol drinking and other lifestyle factors were assessed by questionnaire survey at the initial admission. The patients were followed until December 31, 2016. The crude associations of pretreatment alcohol intake with survival were evaluated by Kaplan-Meier analysis. The Cox proportional hazards model was used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) controlled by confounders. Results: During a median follow-up period of 8.6 years, 261 all-cause and 193 breast cancer-specific deaths were documented. Survival curves showed that ever-drinkers tended to have better survival than never-drinkers (breast cancer-specific survival, log-rank p = 0.0381). Better survival was also observed for light drinkers with an intake of

Suggested Citation

  • Yuko Minami & Seiki Kanemura & Masaaki Kawai & Yoshikazu Nishino & Hiroshi Tada & Minoru Miyashita & Takanori Ishida & Yoichiro Kakugawa, 2019. "Alcohol consumption and survival after breast cancer diagnosis in Japanese women: A prospective patient cohort study," PLOS ONE, Public Library of Science, vol. 14(11), pages 1-19, November.
    • Handle: RePEc:plo:pone00:0224797
    DOI: 10.1371/journal.pone.0224797
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