Which factors are associated with a decreased risk for breast cancer?

Updated: Dec 16, 2019
  • Author: Jessica Katz, MD, PhD, FACP; Chief Editor: Marie Catherine Lee, MD, FACS  more...
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Factors that reduce risk of breast cancer (RR < 1) include the following [8] :

  • Asian, Hispanic, or Pacific islander race
  • Breastfeeding
  • Age < 20 at first pregnancy
  • Tamoxifen use
  • Prior risk-reduction breast surgery
  • History of cervical cancer
  • History of oophorectomy
  • Exercise/active lifestyle
  • Low bone mineral density

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