Overview
- The JAMA Internal Medicine study, published Monday, August 17, 2026, used newly linked National Vital Statistics death records from 2020–2024 to compare nearly 13 million U.S. deaths across 503 occupations.
- Flight attendants and pilots ranked first and second for the share of deaths from cancers tied to ionizing radiation, at about 6.9% and 6.7% respectively after adjustment for age, sex and other factors.
- The excess deaths were concentrated in cancers known to be associated with ionizing radiation, including breast, central nervous system, prostate, melanoma and certain leukemias, while non‑radiation cancers did not show the same pattern.
- Authors stress limits of the analysis: death‑certificate occupations can be misclassified, individual radiation doses were not available, and other work exposures or selection effects could partly explain the results.
- Experts note aircrew receive roughly 3–6 mSv of cosmic radiation per year versus about 0.4 mSv for a heavy occasional traveler, and they say the findings strengthen calls for U.S. dose monitoring and worker protections rather than alarm for passengers.