Elevated PSA Linked to Shiftwork

Men who work night shifts or rotating shifts are more likely to have elevated PSA levels than men who do not.
In an analysis of data from the National Health and Nutrition Examination Survey (2005-2010), Erin E. Flynn-Evans, PhD, of Brigham and Women’s Hospital in Boston, and colleagues found shiftworkers had a 2.6 times increased risk of an elevated PSA (4.0 ng/mL or higher) compared with non-shiftworkers after adjusting for confounders.
The researchers, who published their findings online ahead of print in the Journal of the National Cancer Institute, concluded that sleep or circadian disruption is associated with elevated PSA, indicating that shiftworking men likely have an increased risk of developing prostate cancer.
A previous prospective cohort study of Japanese rotating-shift workers demonstrated that, compared with day workers, rotating-shift workers had a significant threefold increased risk of prostate cancer after adjusting for age, family history of prostate cancer, and other potential confounders, according to a report in the American Journal of Epidemiology (2006;164;549-555).

Take Home Message: If you are caring for a middle age man who does shift work, it is a good idea to encourage him to get a PSA and a digital rectal exam annually.

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