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Jim Liebelt Christian Blog and Commentary

Young Marijuana Smokers at Higher Risk for Psychoses

  • Jim Liebelt
    Jim is Senior Writer, Editor and Researcher for the HomeWord Center for Youth and Family at Azusa Pacific University. Jim has over 25 years of experience as a youth and family ministry specialist, and has been on the HomeWord staff since 1998. He has served over the years as a pastor, author, youth ministry trainer, adjunct college instructor and speaker. Jim’s culture blog and parenting articles appear on HomeWord.com. Jim is a contributing author of culture and parenting articles to Crosswalk.com. Jim and his wife Jenny live in Olympia, WA.
  • 2010 Mar 04
  • Comments

Parents, if you've been waiting for one more reason to talk to your kids about the dangers of using marijuana, here it is...

Teenage marijuana smokers are at higher risk for developing psychoses -- such as schizophrenia, hallucinations and delusions -- compared with those who don't smoke marijuana, a new study says.

The study tracked 3,800 people born from 1981 to 1984, according to researchers at the Brain Institute at the University of Queensland in Australia. They asked the test subjects at ages 14 and 21, and their mothers, about their mental health record and whether they had used any drugs, specifically cannabis. Fourteen percent acknowledged using marijuana for six or more years.

"We looked at the association between how old they were when they first started to use cannabis. And then, on the other hand, we looked at how their mental health was and, in particular, whether they had psychotic disorders or isolated symptoms, such as hallucinations or delusions. And indeed we found a highly significant relationship," said psychiatrist John McGrath, a professor at the Brain Institute, the study's lead researcher.

"For those who started using cannabis when they were 14 or 15, they had about a two-fold risk of schizophrenia."

Previous studies also have looked at the relationship between marijuana use and psychosis.

"The quality of the evidence is really mounting up," McGrath said. "There have been several studies now, which all point in the same direction, and there's consistent and robust evidence that there's an association between cannabis use and increased risk of psychosis."

The University of Queensland study did not consider how much marijuana the teens used, only their age when they started using.

Source: CNN
http://www.cnn.com/2010/HEALTH/03/02/teen.marijuana.risks/