The cross-cultural practice of shamanism reflects an innate capacity for altered states of
consciousness (ASC's) that are elicited by stress, deliberately sought in shamanic rituals …

Substance-induced psychosis (SIP) is characterized by both substance use and a psychotic
state, and it is assumed that the first causes the latter. In ICD-10 the diagnosis is categorized …

Background Cannabis is a risk factor in the onset and persistence of psychotic disorders.
There is concern that non-medical cannabis legalization in Canada may have population …

New-onset psychosis is always disconcerting and alarming for patients, families, and
clinicians. Although some acute psychotic disorders are brief and resolve in a short period of …

BackgroundOne potential cause of comorbidity is the direct causal effect of one disorder–A–
on risk for subsequent onset of disorder B. Could genetic risk scores be utilized to test for …

Background Data-driven classification of long-term psychotic symptom trajectories and
identification of associated risk factors could assist treatment planning and improve long …

Maladaptive substance use and substance use disorders are highly comorbid with
psychiatric illnesses and are frequently associated with the onset and/or exacerbation of …

The widespread use of novel psychoactive substances (NPSs)—defined as new narcotic or
psychotropic agents not classified under the Single Convention on Narcotic Drugs of 1961 …

Abstract Background and Hypothesis To clarify, in a large, representative, longitudinal
sample, the rate and predictors of diagnostic conversion from Bipolar Disorder (BD) to …

TO THE EDITOR: Dr. Scheeringa argues that there are empirical issues with our article (1).
The main contentions are that 1) we did not appropriately address adversity as a confounder …