Director of Developmental Neurobiology at the Queensland Center for Mental Health Research
Not Clearly Pro or Con to the question "Should Marijuana Be a Medical Option?"
"Longer duration since first cannabis use was associated with multiple psychosis-related outcomes in young adults... the longer the duration since first cannabis use, the higher the risk of psychosis-related outcomes...
Compared with those who had never used cannabis, young adults who had 6 or more years since first use of cannabis (i.e., who commenced use when around 15 years or younger) were twice as likely to develop a nonaffective psychosis...
This study provides further support for the hypothesis that early cannabis use is a risk-modifying factor for psychosis-related outcomes in young adults."
"Association Between Cannabis Use and Psychosis-Related Outcomes Using Sibling Pair Analysis in a Cohort of Young Adults," Archives of General Psychiatry, May 2010
Key Experts Physicians [Physicians are the "key experts" in the medical marijuana debate because the issue is thought by many to be ultimately based on the medical value and risks of marijuana, and Physicians, with their training and clinical work, should (at least in theory) have the best knowledge of marijuana's medical value and risks.] [Note: Key Experts definition varies by sites that have this designation.]
Involvement and Affiliations:
Director, Developmental Neurobiology and Epidemiology, Queensland Center for Mental Health Research (QCMHR), 2002-present
Professor, Department of Psychiatry, University of Queensland
Adjunct Professor, School of Biomolecular and Biomedical Sciences, Griffith University
Awarded the Senior Research Award from the Royal Australian and New Zealand College of Psychiatrists, 2005
Awarded a Bellagio Residency from the Rockefeller Foundation, 2005
Cowritten with Joy Welham, James Scott, Daniel Varghese, Louisa Degenhardt, et al.,"Association Between Cannabis Use and Psychosis-Related Outcomes Using Sibling Pair Analysis in a Cohort of Young Adults," Archives of General Psychiatry, May 2010
Cowritten with Sukanta Saha, David Chant, and Joy Welham, "Schizophrenia: A Concise Overview of Incidence, Prevalence, and Mortality," Epidemiologic Reviews, May 2008
Cowritten with J. Hearle, L. Jenner, et al., "The Fertility and Fecundity of Ppatients with Psychoses," Acta Psychiatrica Scandinavica, Nov. 2007
"The Surprisingly Rich Contours of Schizophrenia Epidemiology," Archives of General Psychiatry Jan. 2007
"Hypothesis: Is Low Prenatal Vitamin D a Risk-Modifying Factor for Schizophrenia?," Schizophrenia Research, Dec. 1999
Has published over 100 papers, books, and book chapters