Published in Schizophr Bull on November 04, 2015
Cannabis use and symptom severity in individuals at ultra high risk for psychosis: a meta-analysis. Acta Psychiatr Scand (2017) 1.39
Utility of Washington Early Recognition Center Self-Report Screening Questionnaires in the Assessment of Patients with Schizophrenia and Bipolar Disorder. Front Psychiatry (2016) 0.75
The positive and negative syndrome scale (PANSS) for schizophrenia. Schizophr Bull (1987) 51.07
A rating scale for mania: reliability, validity and sensitivity. Br J Psychiatry (1978) 25.54
Small sample inference for fixed effects from restricted maximum likelihood. Biometrics (1997) 16.06
The global assessment scale. A procedure for measuring overall severity of psychiatric disturbance. Arch Gen Psychiatry (1976) 15.48
Schizophrenia. Lancet (2009) 8.14
Association between duration of untreated psychosis and outcome in cohorts of first-episode patients: a systematic review. Arch Gen Psychiatry (2005) 5.57
The Severity of Dependence Scale (SDS): psychometric properties of the SDS in English and Australian samples of heroin, cocaine and amphetamine users. Addiction (1995) 4.02
A brief mental health outcome scale-reliability and validity of the Global Assessment of Functioning (GAF). Br J Psychiatry (1995) 3.65
Bias and efficiency of multiple imputation compared with complete-case analysis for missing covariate values. Stat Med (2010) 3.41
Early intervention in psychosis. The critical period hypothesis. Br J Psychiatry Suppl (1998) 2.85
Cannabis abuse and the course of recent-onset schizophrenic disorders. Arch Gen Psychiatry (1994) 2.06
First episode schizophrenia-related psychosis and substance use disorders: acute response to olanzapine and haloperidol. Schizophr Res (2004) 2.06
Cannabis use and earlier onset of psychosis: a systematic meta-analysis. Arch Gen Psychiatry (2011) 2.04
Tests of causal linkages between cannabis use and psychotic symptoms. Addiction (2005) 2.02
Substance use in a population-based clinic sample of people with first-episode psychosis. Br J Psychiatry (2007) 1.71
Effects of cannabis use on outcomes of psychotic disorders: systematic review. Br J Psychiatry (2008) 1.53
Patterns of current and lifetime substance use in schizophrenia. Schizophr Bull (1998) 1.42
Cannabis use and outcome of recent onset psychosis. Eur Psychiatry (2005) 1.42
Specificity of the Calgary Depression Scale for schizophrenics. Schizophr Res (1994) 1.33
The impact of cannabis use on cognitive functioning in patients with schizophrenia: a meta-analysis of existing findings and new data in a first-episode sample. Schizophr Bull (2010) 1.32
Psychotic symptom and cannabis relapse in recent-onset psychosis. Prospective study. Br J Psychiatry (2006) 1.25
Cannabis use and misuse prevalence among people with psychosis. Br J Psychiatry (2005) 1.24
Cannabis and first-episode psychosis: different long-term outcomes depending on continued or discontinued use. Schizophr Bull (2009) 1.17
Early detection and intervention in schizophrenia: research. Schizophr Bull (1996) 1.15
Patterns, predictors and impact of substance use in early psychosis: a longitudinal study. Acta Psychiatr Scand (2007) 1.09
Naturalistic follow-up of co-morbid substance use in schizophrenia: the West London first-episode study. Psychol Med (2007) 1.07
Structure and course of positive and negative symptoms in schizophrenia. Arch Gen Psychiatry (1995) 1.07
Cannabis use and first-episode psychosis: relationship with manic and psychotic symptoms, and with age at presentation. Psychol Med (2013) 0.97
Cannabis use in children and adolescents with first episode psychosis: influence on psychopathology and short-term outcome (CAFEPS study). Schizophr Res (2009) 0.95
The UK national evaluation of the development and impact of Early Intervention Services (the National EDEN studies): study rationale, design and baseline characteristics. Early Interv Psychiatry (2013) 0.94
Impact of persistent substance misuse on 1-year outcome in first-episode psychosis. Br J Psychiatry (2009) 0.88
Change in cannabis use, clinical symptoms and social functioning among patients with first-episode psychosis: a 5-year follow-up study of patients in the OPUS trial. Psychol Med (2013) 0.85
Prevalence and impact of cannabis use disorders in adolescents with early onset first episode psychosis. Eur Psychiatry (2011) 0.84
The impact of cannabis use on age of onset and clinical characteristics in first-episode psychotic patients. Data from the Psychosis Incident Cohort Outcome Study (PICOS). J Psychiatr Res (2013) 0.83
Reasons for cannabis use: patients with schizophrenia versus matched healthy controls. Aust N Z J Psychiatry (2008) 0.82
Does giving up substance use work for patients with psychosis? A systematic meta-analysis. Aust N Z J Psychiatry (2012) 0.81
Reasons for cannabis use in men with and without psychosis. Drug Alcohol Rev (2004) 0.80
Cannabis use and first manic episode. J Affect Disord (2014) 0.79
The DrugCheck Problem List: a new screen for substance use disorders in people with psychosis. Addict Behav (2011) 0.78
Cognitive mechanisms of change in delusions: an experimental investigation targeting reasoning to effect change in paranoia. Schizophr Bull (2014) 1.06
Cost-effectiveness of early intervention services for psychosis and fidelity to national policy implementation guidance. Early Interv Psychiatry (2017) 0.75