Grech, A., Van Os, J., Jones, P., Lewis, S., & Murray, R. (2005). Cannabis use and outcome of recent onset psychosis. European Psychiatry, 20(4), 349-353. http://dx.doi.org/10.1016/j.eurpsy.2004.09.013
Purpose: The purpose of this study is to test the theory that recent onset psychotic patients who use cannabis will have psychotic symptoms that are more severe and more persistent than those who do not use cannabis.
Methods: In a cohort study, recruiters’ follow-up with 98 (N=98) patients who were admitted to two South London Hospitals with recent onset of psychosis. To be eligible for the study, participants had to be suffering from psychosis such as delusions, hallucinations, severe speech or thought disorder. Participants had to be under …show more content…
(2008). Effects of cannabis use on outcomes of psychotic disorders: systematic review. The British Journal of Psychiatry, 193 (5), 357-363.http://dx.doi.org/10.1192/bjp.bp.107.046375
Purpose: The purpose of this review was to review the evidence pertaining to whether cannabis affects outcome of psychotic disorders.
Methods: In this review, peer reviewed publications such as MEDLINE, EMBASE, Cumulative Index to Nursing and Allied Health Literature (CINAHL), PsychINFO, ISI Web of Knowledge, Zetoc, BIOSIS, Latin American and Caribbean Health Sciences (LILACS), and Caribbean Health Sciences Literature (MedCarib) were used in a systematic search. Only case control studies that measured cannabis use at a prior time to the outcome being measured or longitudinal studies of people with psychosis were used included in the review. Cohorts with individuals with dual diagnosis of cannabis misuse and psychosis excluded. Researcher searched using the format ((psychosis OR schizophrenia OR hallucinations OR delusions OR synonyms) AND (substance abuse AND synonyms)), and (MeSH) terms. Papers that did not provided separate data for people using cannabis or for people with psychotic disorders excluded. Quality of papers were assessed by recording how confounding factors and bias were accounted for in each study. All MOOSE (Meta-analysis of Observational Studies in Epidemiology) guidelines were …show more content…
From 2000 to 2003, researchers recruited 1,582 students from four high schools in the northern Nova Scotia, Canada. Student recruited for this study were in 10th grade and followed until their 12th grade year. Students were invited to participate were asked to complete an anonymous self-completion questionnaire. Written consent was obtained from participants. Teachers administered survey to participants during regular class time with research members present. Key predictor variables was illicit drug use. Participants were asked how often they used cannabis in the past thirty days: no use; 1-2 times; 3-9 times; 10-19 times; 20-39 times; 40 or more times. Suicidal planning/thinking and suicidal attempt were measured using question from the Centers for Disease Control and Prevention Youth Risk Behavior Surveillance System survey. Participants were asked if they used opiate, LSD, stimulants, ecstasy, PCP, barbiturates, tranquilizers, cocaine, anabolic steroids, psilocybin, or others within the past 30 days. Participants were asked to classify their drug pattern use in the past 30 days: cannabis and other illicit drug; illicit drug use only; cannabis use only; no drug use. Reliability of measures were assessed by repeated survey administration at another high school in the same of rural Nova Scotia.
Purpose: The purpose of this study is to test the theory that recent onset psychotic patients who use cannabis will have psychotic symptoms that are more severe and more persistent than those who do not use cannabis.
Methods: In a cohort study, recruiters’ follow-up with 98 (N=98) patients who were admitted to two South London Hospitals with recent onset of psychosis. To be eligible for the study, participants had to be suffering from psychosis such as delusions, hallucinations, severe speech or thought disorder. Participants had to be under …show more content…
(2008). Effects of cannabis use on outcomes of psychotic disorders: systematic review. The British Journal of Psychiatry, 193 (5), 357-363.http://dx.doi.org/10.1192/bjp.bp.107.046375
Purpose: The purpose of this review was to review the evidence pertaining to whether cannabis affects outcome of psychotic disorders.
Methods: In this review, peer reviewed publications such as MEDLINE, EMBASE, Cumulative Index to Nursing and Allied Health Literature (CINAHL), PsychINFO, ISI Web of Knowledge, Zetoc, BIOSIS, Latin American and Caribbean Health Sciences (LILACS), and Caribbean Health Sciences Literature (MedCarib) were used in a systematic search. Only case control studies that measured cannabis use at a prior time to the outcome being measured or longitudinal studies of people with psychosis were used included in the review. Cohorts with individuals with dual diagnosis of cannabis misuse and psychosis excluded. Researcher searched using the format ((psychosis OR schizophrenia OR hallucinations OR delusions OR synonyms) AND (substance abuse AND synonyms)), and (MeSH) terms. Papers that did not provided separate data for people using cannabis or for people with psychotic disorders excluded. Quality of papers were assessed by recording how confounding factors and bias were accounted for in each study. All MOOSE (Meta-analysis of Observational Studies in Epidemiology) guidelines were …show more content…
From 2000 to 2003, researchers recruited 1,582 students from four high schools in the northern Nova Scotia, Canada. Student recruited for this study were in 10th grade and followed until their 12th grade year. Students were invited to participate were asked to complete an anonymous self-completion questionnaire. Written consent was obtained from participants. Teachers administered survey to participants during regular class time with research members present. Key predictor variables was illicit drug use. Participants were asked how often they used cannabis in the past thirty days: no use; 1-2 times; 3-9 times; 10-19 times; 20-39 times; 40 or more times. Suicidal planning/thinking and suicidal attempt were measured using question from the Centers for Disease Control and Prevention Youth Risk Behavior Surveillance System survey. Participants were asked if they used opiate, LSD, stimulants, ecstasy, PCP, barbiturates, tranquilizers, cocaine, anabolic steroids, psilocybin, or others within the past 30 days. Participants were asked to classify their drug pattern use in the past 30 days: cannabis and other illicit drug; illicit drug use only; cannabis use only; no drug use. Reliability of measures were assessed by repeated survey administration at another high school in the same of rural Nova Scotia.