By Richard G. Stevens
University of Connecticut 

Harvard study strengthens link between breast cancer risk and light exposure at night

 

September 22, 2017



(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.)

(THE CONVERSATION) A study from Harvard has found greater risk of breast cancer in women who live in neighborhoods that have higher levels of outdoor light during the night.

The findings are based on the Nurses’ Health Study (NHS), which has for decades been advancing our understanding of risks to women’s health.

For this study, epidemiologist Peter James and colleagues followed nurses in the NHS for breast cancer occurrence from 1989 to 2013. The home of each of 109,672 nur...



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