SHIFT WORK RISK. “For example, according to the Nurses’ Health Study and case-controlled studies conducted with Norwegian nurses, women that worked night shifts for less than 30 years had a moderately increased risk for breast cancer, and risk was further increased upon working 30 or more years of rotating shift work (relative risk (RR) = 1.36).”
https://www.nature.com/articles/s41591-018-0271-8?fbclid=IwAR01C2Z4J5lxVYDLhxIb9dPb3fhNSZSxwimZvhHaJ4n3-nVPpkt2PNqoukk