Psychotic Disorder

The incidence of cannabis use disorder associated with schizophrenia almost tripled among Canadian teenagers and adults after cannabis legalization, according to a study published in JAMA Network Open.

Teenagers who use cannabis have a much higher risk for developing a psychotic disorder compared with their nonusing peers, according to research published in Psychological Medicine.

PHILADELPHIA — Patients with a psychotic-spectrum disorder may be more likely to develop Parkinson’s disease, especially if they have an additional diagnosis of anxiety, according to a poster presentation.

Frequent nonmedical cannabis use and cannabis use disorder appeared linked to self-reported psychotic disorders, according to study results published in American Journal of Psychiatry.

Healio Psychiatry has compiled a list of its five most-viewed stories in September.

People with severe mental illness in an Israeli public psychiatric hospital opted to be vaccinated against COVID-19 based on their opinion of the vaccine, not distress level, researchers wrote in a study published in Journal of Psychiatric Research.

While poor sleep quality indicated better social functioning, poor sleep and social functioning were associated with increased psychotic-like experiences in college students, according to a study in Journal of Psychiatric Research.

Ketamine did not appear to worsen psychotic symptoms among predisposed patients, according to results of a systematic review published in Journal of Clinical Psychiatry.

Preexisting mental disorders, particularly psychotic and mood disorders, as well as exposure to antipsychotics and anxiolytics, increased risk for COVID-19-related mortality.

Widespread subtle, lower cortical thickness measures were associated with clinical high risk for psychosis, according to results of a working-group mega-analysis published in JAMA Psychiatry.