yep, beware of so-called statistics

I do not see it on Pubmed. It was an abstract at a meeting and not all of those end up on PubMed. And ....AFAIK , most abstracts are not peer-reviewed. If it was an abstract at a poster session at a conference, then more information would only be available in person while there.

I don't know what their questionaire said, but Peter, it might have been something like "did you have a headache at any point on your trip?" That is completely different than asking about headache from AMS. Wording is everything. There is a plethora of retrospective questionnaire-type "studies" these days, eg, Did you eat Frosted Flakes as a child ?

the term junk science is floating around in my head