Pubdate: Tue, 02 Mar 2010 Source: Province, The (CN BC) Copyright: 2010 Canwest Publishing Inc. Contact: http://www.canada.com/theprovince/letters.html Website: http://www.canada.com/theprovince/ Details: http://www.mapinc.org/media/476 Note: from Agence France-Presse Bookmark: http://www.mapinc.org/pot.htm (Cannabis) ANOTHER STUDY SLAMS POT Young adults who started using cannabis at an early age and used it for several years are at increased risk of being diagnosed with a form of psychosis, of hallucinating or having delusions, a study published Monday found. The study conducted at the Queensland Brain Institute at the University of Queensland in Australia asked more than 3,800 young adults, aged around 20 years, about their cannabis use, and assessed them for psychoses, delusional behaviour and to see if they had hallucinations. Just over 14 per cent reported using cannabis for six or more years. The study found that they were twice as likely as those who had never used cannabis to be diagnosed with nonaffective psychoses, such as schizophrenia. These longtime users were also twice as likely to report having hallucinations, and four times as likely to show delusional behaviour as nonusers, the study shows. - --- MAP posted-by: Jo-D