Summary of NTP Cancer Hazard Conclusions Exposure Circumstances That Cause Circadian Disruption:
Persistent Night Shift Work
Certain Lighting Conditions
NTP Review of Shift Work at Night, Light at Night, and Circadian Disruption
Status: NTP cancer hazard assessments
Conclusion(s): NTP concluded that
(1) persistent night shift work can cause breast cancer in women and
(2) certain lighting conditions may be linked to cancer.