Night Shift Work Now Found to Have No Effect on Breast Cancer Risk

LISA SCHULMEISTER, RN, MN, APRN-BC, FAAN
Monday, October 31, 2016
Talk about this article with nurses and others in the oncology community in the General Discussions Oncology Nursing News discussion group.
In its 2007 review, the World Health Organization’s International Agency for Research on Cancer categorized shift work that involves disruption of the circadian rhythm as a probable carcinogen. Although this conclusion was based on animal studies, the messaging to the public was that working nights caused or contributed to the development of breast cancer.

To examine whether or not night shift work could increase the risk of developing breast cancer, researchers at Oxford University in the United Kingdom (UK) followed women enrolled in 3 large UK studies and estimated the relative risks of breast cancer among women who reported that they worked night shifts versus those who reported that they did not work at night.
 
The 522,246 women answered questions on shift work and were followed over time. No increase in breast cancer risk associated with night shift work—including long-term night shifts—was found in any of these studies.

In a subsequent meta-analysis, the researchers combined results from the 3 UK studies with those from all 7 previously published prospective studies (2 in the US, 2 in China, 2 in Sweden, and 1 in the Netherlands). The 10 studies included 1.4 million women among whom 4660 breast cancers occurred in women who reported ever having done night shift work. The meta-analysis confirmed that women who worked night shifts were not more likely to develop breast cancer.

The study findings are available here.
Travis RC, Balkwill A, Fensom GA, et al. Night shift work and breast cancer incidence: three prospective studies and meta-analysis of published studies [published online October 6, 2016]. J Natl Cancer Inst.

Talk about this article with nurses and others in the oncology community in the General Discussions Oncology Nursing News discussion group.
Lisa Schulmeister, MN, RN, ACNS-BC, FAAN
 
Blog Info
Lisa Schulmeister, MN, RN, ACNS-BC, FAAN is an oncology nursing consultant and editor-in-chief of Oncology Nursing News.
Author Bio
Lisa Schulmeister, MN, RN, ACNS-BC, FAAN, is the Editor-in-Chief for OncLive Nursing. She is an oncology nursing consultant and adjunct assistant professor of nursing at Louisiana State Health Sciences Center in New Orleans, LA. She provides continuing nursing education to nurses across the Unites States, is active in several professional nursing organizations, and is intrigued by the many ways nurses use technology to communicate.
 
 
External Resources

MJH Associates
American Journal of Managed Care
Cure
MD Magazine
Pharmacy Times
Physicians' Education Resource
Specialty Pharmacy Times
TargetedOnc
OncNurse Resources

Blogs
Continuing Education
Discussions
Web Exclusives


About Us
Advertise
Advisory Board
Careers
Contact Us
Privacy Policy
Terms & Conditions
Intellisphere, LLC
2 Clarke Drive
Suite 100
Cranbury, NJ 08512
P: 609-716-7777
F: 609-716-4747

Copyright OncNursing 2006-2017
Intellisphere, LLC. All Rights Reserved.