Skip to main content

Table 5 Carcinogenicity classifiations and exposure sources of light-at night and radiation

From: State of the evidence 2017: an update on the connection between breast cancer and the environment

Exposure

IARC

NTP

Use

Shift Work, Light-at-Night

PR

 

Shift work or ambient light pollution

Ionizing Radiation

K

K

Diagnostic medical tests; nuclear medicine procedures; nuclear power plants, research protocols

Non-ionizing radiation (electromagnetic fields)

  

Lighting, computers, cell phones and other electronic sources

  1. International Agency for Research on Cancer (IARC) classifications: 1 = Carcinogenic to humans, 2A = Probably carcinogenic to humans, 2B = Possibly carcinogenic to humans, 3 = Not classifiable as to its carcinogenicity to humans; U.S. National Toxicology Program (NTP) classifications: K = Known to be a human carcinogen, RA = Reasonably anticipated to be a human carcinogen. Source of exposure list contains most common exposure sources