Interesting piece on abcnews - here
- on a study that failed to show a link between cannabis use and the onset of schizophrenia. Professor Joseph Rey of the Faculty of Medicine at the University of Sydney, who's [sic] previous research has identified a link between cannabis and schizophrenia, is sceptical [sic] of the study's results.
He quite rightly points out that not showing a link doesn't mean there is no link.
Personally though, I've looked at a lot of these studies - cannabis is an option for diseases like cancer and Crohn's that offers limited side effects  that is not prescribed in Australia because it is illegal. My own critical analysis of the studies that show a link between cannabis and the onset of schizophrenia don't seem to ask the right kinds of questions to conclusively rule out massaging the results.
Interesting that here:This latest study, led by Dr Martin Frisher of Keele University, examined the records of 600,000 patients aged between 16 and 44, but failed to find a similar link.
"An important limitation of many studies is that they have failed to distinguish the direction of association between cannabis use and psychosis," the authors write in the latest edition of the journal Schizophrenia Research.
600 000 is a pretty darn big sample size.
And see that bit that they looked at? The DIRECTION of association - that's the bit that always annoys be that is left out of other studies. They point out that "although using cannabis is associated with a greater risk of developing psychosis, there is also evidence of increased cannabis use following psychosis onset."They argue if cannabis use does cause schizophrenia, then an increase in cannabis use should be followed by an increase in the incidence of schizophrenia.
According to the study, cannabis use in the UK between 1972 and 2002 has increased four-fold in the general population, and 18-fold among under-18s.
Based on the literature supporting the link, the authors argue that this should be followed by an increase in schizophrenia incidence of 29 per cent between 1990 and 2010.
But the researchers found no increase in the rates of schizophrenia and psychosis diagnosis during that period. In fact, some of the data suggested the incidence of these conditions had decreased.
Interesting study, indeed.
I went through all kinds of side effects from the drugs I was given for Crohn's - one of which left me this sensitivity to all kinds of sulfurs that now gives me hives. I have hives today in fact. Thanks orthodox medicine!