Cannabis/schizophrenia link questioned

July 26, 2007

The Swiss government is questioning the results of a study showing a link between marijuana use and schizophrenia.

The Zurich University study showed a higher incidence of schizophrenia in the 1990s in the age groups most likely to use cannabis, Swissinfo said Wednesday.

"We know from other experimental studies that cannabis can cause psychosis, but we have now established a clear link to schizophrenia for the first time," study co-author Wulf Rossler said.

Swissinfo said the Federal Health Office is questioning the report, saying the patients' drug histories and other medical details remained unknown.

"It does not uncover the medical history of the patients, for instance the consumption of psychotic substances or other factors that could lead to psychotic illnesses," the health office in a statement.

Copyright 2007 by United Press International

Explore further: Clearing up confusion between correlation and causation

Related Stories

The anthropology of humanitarianism

May 1, 2014

Erica Caple James conducted her dissertation research in trying circumstances: in Haiti, following the 1994 removal of the country's military leaders. It was a time of social conflict and discord, yet the sense of the anxiety ...

Parasites in cat poop: Potential public health problem?

July 9, 2013

Each year in the United States, cats deposit about 1.2 million metric tons of feces into the environment, and that poop is carrying with it what may be a vast and underappreciated public health problem, say scientists July ...

Jarid2 may break the Polycomb silence

April 30, 2012

Historically, fly and human Polycomb proteins were considered textbook exemplars of transcriptional repressors, or proteins that silence the process by which DNA gives rise to new proteins. Now, work by a team of researchers ...

Recommended for you

Machine Translates Thoughts into Speech in Real Time

December 21, 2009

(PhysOrg.com) -- By implanting an electrode into the brain of a person with locked-in syndrome, scientists have demonstrated how to wirelessly transmit neural signals to a speech synthesizer. The "thought-to-speech" process ...

Quantum Theory May Explain Wishful Thinking

April 14, 2009

(PhysOrg.com) -- Humans don’t always make the most rational decisions. As studies have shown, even when logic and reasoning point in one direction, sometimes we chose the opposite route, motivated by personal bias or simply ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.