Study finds pilots and flight attendants have highest cancer mortality rates from radiation

Elevated Cancer Risk in Aviation Professions

A recent study published in JAMA Internal Medicine found that flight attendants and pilots exhibit the highest mortality rates from radiation-related cancers compared to over 500 other occupations. This finding suggests a significant occupational health concern for individuals working in aviation, where exposure to cosmic radiation is higher due to frequent high-altitude travel.

Study Methodology and Findings

The research analyzed national data from more than 12 million death certificates, which included occupational information. The study specifically examined death rates from cancers known to be linked to radiation exposure, such as leukemia, lymphoma, multiple myeloma, and cancers of the skin, breast, thyroid, prostate, and central nervous system. Flight attendants showed approximately 50% higher odds of dying from a radiation-related cancer than the general working population, while pilots had about 36% higher odds.

Role of Cosmic Radiation

Cosmic radiation, originating from space, has a greater impact on individuals flying at high altitudes. While only a small amount reaches Earth's surface, the increased exposure during flights is hypothesized to be the underlying cause of the elevated cancer rates. Commentary writers Catherine Olsen and Ken Karipidis noted that neither group showed higher-than-normal death rates from cancers not tied to radiation, supporting the hypothesis that occupational radiation exposure is the primary factor.

Absolute Risk and Limitations

In terms of absolute risk, about 6.9% of flight attendant deaths and 6.7% of pilot deaths were attributed to these cancers, compared to 5% in the general working population. The study's authors acknowledged limitations, including the inability to precisely quantify individual radiation exposure or account for potential misclassification of occupations on death certificates. Other potential contributing factors specific to these professions were also not fully accounted for.