Paywall, https://www.nature.com/articles/s41562-019-0754-8 Not available via Scihub at time of posting.
That's a very biased assumption. It could be that whatever "anxiety" means here is a result of, not the cause. Anxiety is typically excessive worry about specific things. If we're talking about the impact of sleep loss, we're not at all talking about the same thing. Too much caffeine gives the shakes, that's still not anxiety by any definition even though superficially it looks quite similar. Has medical science simply given up being careful about not mixing up the direction of causality? I guess that has to logically follow not caring anymore about correlation not meaning causation and not being bothered by subjective evidence from open labels trials run by biased and conflicted researchers. Centuries of progress cast aside because it's too hard to do it right...
