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UK: Cannabis linked to violence in young men

BBC News Online

Thursday 12 Jul 2001

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Young men who take cannabis are more violent, researchers suggest

Young men who take cannabis are five times as likely to be violent as
those who do not take it, research has revealed.

The drug is more usually associated with mellow moods.

But the scientists who carried out the study told BBC News Online the
link to violence was not due to any effects of the drug - instead it was
because users are involved in the illegal drug market.

New Zealand scientists have carried out the first study into the overlap
between mental disorders and violence in young men.

Almost 1,000 babies born between April 1972 and March 1973, in Dunedin,
New Zealand were studied as they grew up.

When they were studied at 21, 34% of the young men who had a cannabis
habit had a conviction for violence or had committed violent behaviour
in the previous year.

The research was presented to the Royal College of Psychiatrists' annual
meeting in London.

Drug market

Dr Louise Arseneault, from the Institute of Psychiatry in London, told
BBC News Online: "The cannabis users had an earlier history of conduct
disorders as adolescents. Violence was associated with their involvement
in the drug market."

There was also a three-fold risk increase associated with men suffering
from schizophrenia or dependent on alcohol.

Of the total sample, 40% had mental disorders and were five times more
likely to be violent than people without mental conditions.

Dr Arseneault said: "There is a substantial minority of young adults
with specific mental disorders who are responsible for a substantial
proportion of violence in the community."

She said people with at least one of the disorders constituted a fifth
of the sample, but accounted for more than half the convictions for
violence.

"People with two of these disorders have an increased risk for violence
eight to 18 times greater than that for people with no disorders," she
added.

Dr Arseneault added: "Not all mentally-ill individuals engage in
violence. The link is limited to three groups - those dependent on
alcohol, those dependent on cannabis, and adults with schizophrenia."

 

 

 

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