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Daily Pot Use Tied To Age of First Psychotic Episode

An anonymous reader writes "Reuters reports, 'In a study of adults who experienced psychosis for the first time, having smoked marijuana daily was linked to an earlier age of onset of the disorder.' ..."This is not a study about the association between cannabis and psychosis, but about the association between specific patterns of cannabis use ... and an earlier onset of psychotic disorders,' Dr. Marta Di Forti, who led the research at the Institute of Psychiatry at Kings College, said in an email. Among more than 400 people in South London admitted to hospitals with a diagnosed psychotic episode, the study team found the heaviest smokers of high-potency cannabis averaged about six years younger than patients who had not been smoking pot. Psychosis is a general term for a loss of reality, and is associated with several psychiatric diseases, including schizophrenia and bipolar disorder. ... "The thorny question is whether they might otherwise have developed the disease or would have not had mental illness. It's a distinction we haven't figured out yet," Compton said. ... It is still unclear whether there are safe levels of use for cannabis, she added. '"

6 of 382 comments (clear)

  1. Source data for this study? by SpankiMonki · · Score: 5, Interesting

    From TFA:

    The researchers surveyed 410 patients between the ages of 18 and 65, two thirds of them male, all of whom had a psychotic episode and were admitted to in-patient psychiatric units.

    I'm not a statisticianololgist, but passing out surveys to psychotic people in a mental hospital doesn't seem to me to be the best way to gather accurate data for a study.

  2. Worthless and inconclusive research, I'm afraid... by bogaboga · · Score: 4, Interesting

    And this is because this research doesn't answer the following question:

    Can we be sure that even though psychosis manifested itself earlier in the subject population, it (psychosis), still maifested itself later in this particular group?

    In otherwords, can we be sure that pot use in this specific group didn't delay psychosis even though on average, psychosis came earlier as compared to the other group?

    I know of folks who use pot daily. They are now in their late 90s. One could argue that pot is responsible for their delayed psychosis if at all, no?

  3. Re:This just in... by JoeMerchant · · Score: 4, Interesting

    But, is it the THC, or the lack of social support and constant surreptitious activity required to obtain and use pot that leads to earlier onset?

    Put another way, would the same thing have been found in a study of alcohol use during prohibition? Or, will the same study replicated today in Colorado, have different findings?

     

  4. Re:Cause and effect may be backwards by Curtman · · Score: 5, Interesting

    It's been documented in may places.

    Decline in the Incidence of Schizophrenia in Finnish Cohorts Born From 1954 to 1965

    If there was a causal link between marijuana use and schizophrenia for example, there would be an increase that could be shown in historical data. The evidence instead suggests that maybe some people have been successful at self-medicating.

  5. Yes and no... by f3rret · · Score: 4, Interesting

    While I am all for legalizing it, the article does have a point.

    I recall at least one British study looking at the link between cannabis and psychosis that found that strains with a high THC/other canabinoids ratio would cause tests subjects to score higher on at least one standard test questionnaire for psychosis, while subjects injected with a more 'natural' blend of THC and other canabinoids would tend to get a psychosis score not much different from them being sober.

    The conclusion as I recall was that there is some evidence that strains bred specifically for a high THC content could be more likely to cause psychotic event or temporary psychosis-like states.
    BBC did a documentary that filmed part of said study, here it is: http://youtu.be/ZGr0ne9FHOM

    --
    Admit nothing. Deny Everything. Make Counter-accusations.
  6. Re:Reefer madness? by pspahn · · Score: 4, Interesting

    Speaking of side effects of the War on Drugs, there was an interesting story the other night on the news in Denver.

    A lot of pot shops are employing military grade security personnel to protect them these days. Granted, one of the most likely reasons is that this is a cash based business (the only non-cash transactions are based on creative use of ATMs), so there is motivation from others to rip them off on their way to deposit their monies. However, it is clear that the need for such specially trained security is due to the fact that pot was illegal for so long and run by the black market. Now you have those same thugs trying to rip off these businesses trying to get their hands on the product so they can take it back to the black market.

    Had there not been a War on Drugs in the first place, there really wouldn't be this need for such high security at these shops.

    Of course, on the other hand, it has helped to improve our local economy. I would say that I have approximately 20 friends that I see on a regular basis. Out of those 20, nearly half of them are employed directly by pot facilities, and several more are employed indirectly by businesses that have pot shops as clients.

    There are many effects the War on Drugs has had on our society, and most of those effects are not going to be known until the War on Drugs ceases to exist.

    --
    Someone flopped a steamer in the gene pool.