4 ms·

> Cannabis is involved in approximately 50% of psychosis, schizophrenia, and schizophreniform psychosis cases. Thats significant, wouldn't you say? Absolutely

> Cannabis is involved in approximately 50% of psychosis, schizophrenia, and schizophreniform psychosis cases. Thats significant, wouldn't you say? Absolutely not. Alcohol is involved in 60% of the snake bites in the US. It’s easy to see the causal link. But that isn’t a reason to avoid alcohol or that alcohol puts you at a significant risk of being bitten by a snake. And that’s because alcohol consumption is common and snake bites are rare. Similarly, cannabis consumption is common and the conditions you list are rare. Even if there is a causal link there, and that’s a big if, that’s not a reason to avoid cannabis. There’s no reason to assume or even worry about being in the sub-1% group.

goldenkey 4y ago
It's not rare at all. Every practicing psychiatrist I've talked to that works part-time at mental hospitals, have told me they see cannabis related temporary psychosis on the regular. The studies show it to be common. Anecdotes show it to be common. And yet, it's not common - what gives? https://pubmed.ncbi.nlm.nih.gov/30902669/ https://pubmed.ncbi.nlm.nih.gov/30902669/
- curun1r 4y ago
  Studies absolutely don't show it to be common. Here's a meta analysis [0] of many that, as I mentioned, shows it below 1% of the population. That's rare. Don't confuse it being easy to find with it being common. Whenever you have a large number of people, you're going to reliably find rare traits and conditions. [0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5896987/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5896987/
  - goldenkey 4y ago
    The majority of cannabis legalization has occurred in the last few years. The paper you linked uses decades old data and provides statistics on overall incidence of schizophrenia with varying durations of prevalence. Bayes rule applies here - not everyone will go buy cannabis and use it daily. Unless a study is accounting for these factors, it's useless in making a determination on the connection between psychosis and cannabis. Your own point applies, frequency must be adjusted for, by an understanding of priors.
- the_only_law 4y ago
  I’m not trusting a single “study” on marijuana after the last time I researched an aspect the drug and every goddamn paper just contradicted another.

goldenkey 4y ago

It's not rare at all. Every practicing psychiatrist I've talked to that works part-time at mental hospitals, have told me they see cannabis related temporary psychosis on the regular. The studies show it to be common. Anecdotes show it to be common. And yet, it's not common - what gives? https://pubmed.ncbi.nlm.nih.gov/30902669/ https://pubmed.ncbi.nlm.nih.gov/30902669/

curun1r 4y ago
Studies absolutely don't show it to be common. Here's a meta analysis [0] of many that, as I mentioned, shows it below 1% of the population. That's rare. Don't confuse it being easy to find with it being common. Whenever you have a large number of people, you're going to reliably find rare traits and conditions. [0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5896987/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5896987/
- goldenkey 4y ago
  The majority of cannabis legalization has occurred in the last few years. The paper you linked uses decades old data and provides statistics on overall incidence of schizophrenia with varying durations of prevalence. Bayes rule applies here - not everyone will go buy cannabis and use it daily. Unless a study is accounting for these factors, it's useless in making a determination on the connection between psychosis and cannabis. Your own point applies, frequency must be adjusted for, by an understanding of priors.
the_only_law 4y ago
I’m not trusting a single “study” on marijuana after the last time I researched an aspect the drug and every goddamn paper just contradicted another.