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Is cannabis a causal risk factor for psychosis?
In this review we have tried to determine whether cannabis is a cause of schizophrenia. We have shown that all the available population-based studies on the issue have found that cannabis use is associated with later schizophrenia outcomes (Table 1).
All these studies support the concept of temporal priority by showing that cannabis use most probably preceded schizophrenia.
These studies also provide evidence for direction by showing that the association between adolescent cannabis use and adult psychosis persists after controlling for many potential confounding variables such as disturbed behaviour, low IQ, place of upbringing, cigarette smoking, poor social integration, gender, age, ethnic group, level of education, unemployment, single marital status and previous psychotic symptoms. Further evidence for a causal relationship is provided by the presence of a dose-response relationship between cannabis use and schizophrenia (Andréasson et al, 1988; van Os et al, 2002; Zammit et al, 2002), specificity of exposure (Arseneault et al, 2002; van Os et al, 2002; Zammit et al, 2002; Fergusson et al, 2003) and specificity of the outcome (Arseneault et al, 2002). Overall, cannabis use appears to confer a twofold risk of later schizophrenia or schizophreniform disorder (pooled odds ratio=2.34; 95% CI 1.69-2.95).
originally posted by: theabsolutetruth
a reply to: Aleister
I didn't make any case of my own about this, I posted the research and the titles of the research.
originally posted by: Aleister
and who knows what else (what is the correlation between heavy sugar consumption, including soda, and mental illnesses?).
originally posted by: theabsolutetruth
Are there any ATS members that actually respect such research instead of shouting ''propaganda'' at anything that doesn't suit their own agenda?
I think it should be publicised as it is obviously something those contemplating drug use need to know and in order for a cohesive, forward focused caring society.
originally posted by: theabsolutetruth
Further research that confirms the IoPP research from The British Medical Journal.
www.bmj.com...
originally posted by: Astyanax
a reply to: theabsolutetruth
In this thread, the OP asked for opinions about why there had been a recent increase in claims of 'gangstalking' and people claiming to be 'targeted individuals'.
Here is my first post on that thread, in full:
I put it down to the enormous popularity of coc aine as a recreational drug.
I had (silly me) forgotten the even greater popularity of high-potency cannabis.
It's no news to ATS members that conspiracy theories have been 'mainstream' for some time. Recently, I've noticed another upsurge in social media. Formerly sensible people on my Facebook page have suddenly gone all conspiracy-theorist.
They're all smokers.
I posted the BBC article in the OP on my Facebook wall this morning. I've no doubt there'll be some interesting responses. But it is even more relevant here. Social media plus high-potency cannabis may well add up to an epidemic of paranoid schizophrenia. Don't say no-one told you they saw it coming.
The researchers did find a connection between skunk use and the likelihood of a psychotic episode, but crucially this was for those who started using the drug very young and did so very regularly.
The study specifically did not show that cannabis use triggered psychosis. In fact, it showed the opposite. Plenty of people in the control group had smoked cannabis and not had a psychotic episode. In fact, patients who had suffered psychosis were no more likely than the control group to have tried cannabis.
It makes the case for legalising cannabis much more compelling. It's by regulating the market for a drug that you can prevent harm. And in this case, there is a very clear way to do that – encourage the use of milder varieties which have been shown to be harmless.
As Danny Kushlick of Transform says:
"Skunk is a product of prohibition itself. The iron law of prohibition is that it will produce the most potent variety, just like crack in the coc aine market. It's pure economics. The economics of a deregulated market determines that the most potent, high yield, highest profit version will dominate. And that's what skunk is.
"In a legally regulated market that's not the case and you have a variety. Currently, cannabis is like a market where you go into the pub and all they've got on tap is absinthe. It's ludicrous. What you want are low-alcohol beers and wines and other things. Where people have a choice they graduate towards milder versions."
originally posted by: Astyanax
In my wide and deep experience of this issue, there is a definite, visible link between weed and serious, clinical wackiness.
originally posted by: theabsolutetruth
a reply to: Answer
Go back and read ATS T&C.
Firstly do not presume anything about me.
This thread is about the research so all the idiots and their irrational vitriolic attacks are just proving the research correct.
The thread isn't an 'opinion' thread it is about factual professional research. If you don't like the research, tough. If anyone doesn't agree to it then I suggest they go tell the researchers.
Either way I do not care for their opinion and won't bother replying to anything unless it is rational. So far, most comments have been nasty and spiteful, just for the fact that I posted this research, not my opinion, I didn't mention that until around page 6 of this thread, the vitriol was aimed at me for just posting research.
I posted this thread because I can and because I choose to, it isn't for ''support'' but because it is good research that is valid and important.
You are just another poster spouting irrational hatred at me for just making a thread that you do not like because you do not like the professional research on which is is based.
If you don't like the research or the fact that I think it is truly valid and worthy then I suggest you contact IoPP and The Lancet, I am sure they will find your unprofessional objections equally as irrational and unfounded.