Levy S, et al. - Researchers assessed the impact of marijuana use among adolescents in terms of psychotic symptoms like hallucination, anxiety, and depression among users.

• Data from a survey of health and substance use given to a convenience sample of young candidates between 14-18 years presenting for routine care was evaluated.
• They inquired 1,235 subjects about participation, and 527 agreed to, for a response rate of 42.7%.
• They used 2 questions regarding acute psychotic symptoms: “In the past 12 months, how often have you felt anxious or paranoid during or after using marijuana?” and “In the past 12 months, how often have you seen, felt, or heard things that were not really there ie, hallucinations during or after using marijuana?”
• They also asked standardized questions about symptoms of cannabis use disorder (based on the modified World Mental Health Composite International Diagnostic Interview), anxiety (based on the 2-item Generalized Anxiety Disorder scale), and depression (based on the Patient Health Questionnaire 2) and sociodemographic characteristics.
• They involved 146 respondents who confirmed past-year marijuana use and had complete data for measures of interest.