HHS Public Access Author manuscript Author Manuscript

Sleep Med. Author manuscript; available in PMC 2017 April 01. Published in final edited form as: Sleep Med. 2016 April ; 20: 25–29. doi:10.1016/j.sleep.2015.11.010.

Sleep duration and breast cancer risk among black and white women Qian Xiao1, Lisa B. Signorello2, Louise A. Brinton3, Sarah S. Cohen4, William J. Blot4,5, and Charles E. Matthews1 1Nutritional

Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, Maryland, USA

Author Manuscript

2Division

of Cancer Prevention, National Cancer Institute, National Institutes of Health, Rockville, Maryland, USA

3Hormonal

and Reproductive Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, Maryland, USA 4International

Epidemiology Institute, Rockville, Maryland, USA

5Division

of Epidemiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee

Abstract Author Manuscript

Background—Sleep has been suggested to influence breast cancer risk, however the evidence is mixed. Black women have higher prevalence of both short (