Sorry, Cannabis Legalization STILL NOT Crazy-Making, Or Deadly For That Matter

The latest fearmongering "Reefer Madness" study is making the rounds now.  This one insinuates (with the requisite hedging of language, of course) that cannabis legalization in Canada might have been linked to an increase in schizophrenia and other psychosis.  But the study doesn't actually say that at all.  A more careful reading of the study reveals that the incidence of schizophrenia proper has NOT actually increased overall following legalization.  Nor does the study actually show that the prevalence or incidence of psychosis in general has increased either (only the vague nebulous category of "psychosis not otherwise specified (NOS)" increased somewhat, and other psychosis diagnoses were not even looked at) for some reason. Natch.

The authors do concede that previous studies on both the USA and Canada have also repeatedly failed to find any significant link between medical or recreational legalization and either schizophrenia or psychosis in general.  But they laughably claim that such studies were too "underpowered" to detect anything.  Riiiiiight.  Perhaps because the supposed effect they were looking for was just noise all along?  

Occam's Razor, anyone?  Point is, if you torture the data enough, they will confess to anything.  And of course, one of the authors disclosed that they personally have ties to (surprise, surprise!) the pharmaceutical industry.

In other news, around the same time that was published, another Canadian study was published in the same journal that found that those who had emergency room visits or hospitalizations listed as related to "cannabis use disorder" were statistically more likely to die in the five years following such admissions.  That study made for some scary news headlines as well, but not only are such patients not even remotely representative of typical cannabis users, but as the requisite linguistic hedging reveals, no definitive casual link could be proven here either.  That is, it was impossible to rule out all alternative explanations even after attempting to adjust for known confounding factors.  

And regardless, clearly this study says nothing at all about legalization.  If weed legalization had somehow resulted in excess deaths in the general population, it certainly would have been all over the news, but it apparently didn't.

It seems like the standards for what gets published in medical and scientific journals these days are really approaching (if not already hitting) rock bottom.  When silly junk science (or approaching junk science) studies like these come out, the very best thing that we can do is to mercilessly mock them as far and wide as humanly possible.