Men who work a rotating shift pattern may be at increased risk of prostate cancer, research suggests. Japanese scientists found that staff working rotating shifts were three times as likely to develop the disease as those working day or night shifts.

Tatsuhiko Kubo and others. Prospective cohort study of the risk of prostate cancer among rotating-shift workers: Findings from the Japan Collaborative Cohort Study, American Journal of Epidemiology, volume 164, pages 549-555, 2006.