Aug. 27, 2012 —

Science Daily/University Hospitals Case Medical Center

Lack of sleep is linked to more aggressive breast cancers, according to new findings published in the August issue of Breast Cancer Research and Treatment by physician-scientists from University Hospitals Case Medical Center's Seidman Cancer Center and Case Comprehensive Cancer Center at Case Western Reserve University.

"This is the first study to suggest that women who routinely sleep fewer hours may develop more aggressive breast cancers compared with women who sleep longer hours," said Dr. Thompson, who is Assistant Professor at Case Western Reserve University School of Medicine and lead author. "We found a strong correlation between fewer hours of sleep per night and worse recurrence scores, specifically in post-menopausal breast cancer patients. This suggests that lack of sufficient sleep may cause more aggressive tumors, but more research will need to be done to verify this finding and understand the causes of this association."

"Short sleep duration is a public health hazard leading not only to obesity, diabetes and heart disease, but also cancer," said Li Li, MD, PhD, a study co-author and family medicine physician in the Department of Family Medicine at UH Case Medical Center and Associate Professor of Family Medicine, Epidemiology and Biostatistics at Case Western Reserve University School of Medicine. "Effective intervention to increase duration of sleep and improve quality of sleep could be an under-appreciated avenue for reducing the risk of developing more aggressive breast cancers and recurrence."

http://www.sciencedaily.com/releases/2012/08/120827113359.htm