New study suggests link between breast cancer, working the night shift
Circadian rhythm disruption, melatonin decrease could be factors
A new study has found that working the night shift long-term may double a woman’s risk of breast cancer.
The association was found in women who did night shift work for 30 or more years. The researcher team led by Kristan Aronson, a professor of public health sciences at the Queen's Cancer Research Institute at Queen's University in Kingston, Ontario, found no increased risk among women who worked that shift fewer than three decades.