Assessing the impact of cannabis use on trends in diagnosed schizophrenia in the United Kingdom from 1996 to 2005.
Frisher M, Crome I, Martino O, Croft P.

Department of Medicines Management, Keele University, Staffordshire, ST5 5BG, United Kingdom.

A recent systematic review concluded that cannabis use increases risk of psychotic outcomes independently of confounding and transient intoxication effects. Furthermore, a model of the association between cannabis use and schizophrenia indicated that the incidence and prevalence of schizophrenia would increase from 1990 onwards. The model is based on three factors: a) increased relative risk of psychotic outcomes for frequent cannabis users compared to those who have never used cannabis between 1.8 and 3.1, a substantial rise in UK cannabis use from the mid-1970s and c) elevated risk of 20 years from first use of cannabis. This paper investigates whether this has occurred in the UK by examining trends in the annual prevalence and incidence of schizophrenia and psychoses, as measured by diagnosed cases from 1996 to 2005. Retrospective analysis of the General Practice Research Database (GPRD) was conducted for 183 practices in England, Wales, Scotland and Northern Ireland. The study cohort comprised almost 600,000 patients each year, representing approximately 2.3% of the UK population aged 16 to 44. Between 1996 and 2005 the incidence and prevalence of schizophrenia and psychoses were either stable or declining. Explanations other than a genuine stability or decline were considered, but appeared less plausible. In conclusion, this study did not find any evidence of increasing schizophrenia or psychoses in the general population from 1996 to 2005.
http://www.ncbi.nlm.nih.gov/pubmed/19560900

released 26th June 2009 this research in fact formed a key part of the ACMD review of cannabis reclassification
http://www.guardian.co.uk/society/2008/apr...alcohol.justice

Nice one, another one. There comes a point when the evidence goes past overwhelming and into the realms of ner ner ner ner ner, you're just fucking wrong

yep

a massive comprehensive survey of millions of cases over 9 years

and that's why the theiving mass-murdering mother fuckers in government have been keeping this as quiet as possible

they have had hard evidence that their line on cannabis has been wrong since early 2008

but they've kept on lying with the stealing and killing

"The Advisory Council on the Misuse of Drugs took its decision in private on Tuesday after presentations of research confirming the increased potency of most cannabis available on the street, but dispelling fears the drug has led to a growth in mental health problems."

this massive study was part of that research presented to the ACMD

and the dates are relevant I think... 1996, when I first started seeing "skunk" in a major way --- something like about 85% or more of the cannabis market these days, I would guess more

so the whole high THC (no CBD) cannabis line was a pile shit too: scizophrenia levels started to level off and then declined from 1996 to 2005 roughly the timeframe indoor grown "skunk" started taking over

all this in the context of the established medical fact that CBD is also anti-psychotic

so we can have: skunk which doesn't make us mad, or imported hash which is actively anti-psychotic

as it is - very high THC (no CBD) ganja has been around in Tropical Asia for fucking millenia so it was obvious the whole Neo Reefer Madness thing was a pile of shit