Does Shift Work Cause Cancer?
IARC thinks so. Others have recently published papers claiming that breast cancers and melanomas are probably caused by exposure to electric lighting at night. However, a new study published in the American Journal of Epidemiology looked at 73,049 Chinese women and found no association between breast cancer and night-shift work, irrespective of frequency, duration or cumulative shift work. The authors conclude that "it may be premature to consider shift work a cause of cancer."
