Radiation at higher atmosphere is indeed an issue but one hard to control for in a aluminum plane. I'd love to see more mfg embrace electric compressors instead of bleed air for cabin pressurization to reduce the CNS issues faced by pilots, stewards and passengers due to toxic air syndrome from the contaminants aerosolized by engine-supplied bleed air into the cabin. It's so gross, so preventable, and possibly criminal as operators and manufacturers are found liable for injuries.
I would think though not the direct exposure alone? Maybe its also euipment and food/drink getting hot in a workhorse plane? Needs geiger counter direct sampling
Sounds like they controlled for it: "The researchers then examined mortality across occupations, separating out radiation-related and non–radiation-related cancers"
Was going to say this article doesn't seem to mention the full-body scanners at the airport that I believe flight crews also need to go through... but apparently these days most of these don't use x-rays and rather use radio waves. Interesting!
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