BACKGROUND Disruptions in thalamic functional connectivity have been observed in people with schizophrenia and in youth at clinical high risk (CHR) of psychosis. However, the impact of environmental risk factors for psychosis on thalamic dysconnectivity is poorly understood. We tested whether thalamic dysconnectivity is related to patterns of cannabis use in a CHR sample. METHODS 162 CHR and ...

INTRODUCTION Cannabis is Europe's most commonly used illicit drug. Some users do not develop dependence or other problems, whereas others do. Many factors are associated with the occurrence of cannabis-related disorders. This makes it difficult to identify key risk factors and markers to profile at-risk cannabis users using traditional hypothesis-driven approaches. Therefore, the use of a data-...

While the effects of cannabis use on retrospective memory have been extensively examined, only a limited number of studies have focused on the links between cannabis use and prospective memory. We conducted two studies to examine the links between cannabis use and both time-based and event-based prospective memory as well as potential mechanisms underlying these links. For the first study, 805 ...

AIMS To examine trends in patterns of cannabis use and related harm in the Australian population between 1993 and 2007. DESIGN Analysis of prospectively collected data from: (1) the National Drug Strategy Household Survey (NDSHS) and Australian Secondary Student Alcohol and Drug Survey (ASSADS); (2) the National Hospital Morbidity Database (NHMD); and (3) the Alcohol and Other Drug Treatment ...

Cannabis use is common in youth and there is evidence that the co-occurrence of cannabis use (and other substance use) with mental illnesses predicts poorer outcomes, including suicide. The main purposes of this study were to: (i) identify rates of cannabis use and substance use disorder risk, and (ii) predictors for cannabis use among youth seeking help for mood and/or anxiety concerns in a sa...

Background Because cannabis use is associated with social, physical and psychological problems, it is important to know what causes some individuals to initiate cannabis use and a subset of those to become problematic users. Previous twin studies found evidence for both genetic and environmental influences on vulnerability, but due to considerable variation in the results it is difficult to dra...

Cannabis is the most widely used and variably regulated drug in the world, with increasing trends of use being reported in the US, Australia, Asia, and Africa. Evidence has shown a decrease in the age of commencement of cannabis use in some developed countries and a prolongation of risk of initiation to cannabis use beyond adolescence among more recent users. Cannabis use is associated with num...

INTRODUCTION AND AIMS Anecdotal reports suggest that high rates of cannabis use and dependence are significant issues in Indigenous communities in north Queensland; however, there is little scientific evidence to support or refute this. The Cape York Cannabis Project seeks to investigate cannabis use rates, cannabis dependence and mental health impacts for the first time in three Cape York Indi...