New study links cosmic radiation to higher cancer death risk in flight crews

A new study published in JAMA Internal Medicine reveals that flight attendants and pilots face the highest risk of dying from radiation-related cancers, surpassing those who work with radioactive materials. Cosmic radiation originates from space, but exposure is more significant for individuals flying at high altitudes. Although previous small studies have suggested a link between exposure and higher cancer death rates among frequent flyers, this study provides compelling evidence to support this connection.

Researchers utilized national data from over 12 million death certificates to analyze death rates from radiation-related cancers, such as leukaemia, lymphoma, multiple myeloma, and various types of skin, breast, thyroid, prostate, and central nervous system cancers. Among the 500 occupations studied, flight attendants had the highest percentage of deaths from these cancers, followed by pilots.

The study found that flight attendants had approximately 50% higher odds of dying from radiation-related cancers compared to the general working population, while pilots had about 36% higher odds. In absolute terms, around 6.9% of flight attendant deaths and 6.7% of pilot deaths were attributable to these cancers. The general working population had a 5% risk of dying from such cancers.

While the study acknowledges certain limitations, including the lack of precise exposure measurements and potential misclassification of occupations, it underscores the importance of addressing radiation exposure risks for aircrews. Experts and union leaders emphasize the need for increased awareness, regular health screenings, and more comprehensive monitoring of radiation exposure for flight attendants and pilots.