Dual Diagnosis (Psychosis and Cannabismisuse): Comparison of Specialized Treatment Versus Unspecified Treatment

Phase 1

Completed

• Conditions: Intervention; Psychotic Disorders; Marijuana Abuse
• Interventions: Behavioral: Social competence Training; Behavioral: Cannabis-Consumption-Reduction-Training

• Registration Number: NCT00783185
• Lead Sponsor: University of Konstanz

Brief Summary

Intention of the study is to examine, if the symptomatology of dual diagnosis patients is less severe after a special indication training for reduction of cannabis consumption in comparison to unspecified trainings.

Point of interest is psychopathology and consumerism.

Detailed Description

Dual diagnosis patients (psychosis and cannabis abuse) account for more clinical admissions than single diagnosis patients.

Cannabis misuse is a known risk factor for recurrence of psychosis.

A specified intervention on the basis of a manual for schizophrenic substance abusers is administered to inpatients in a specialized unit for young schizophrenic patients in a psychiatric hospital.

The control group, same indication (psychotic disorder and cannabis misuse) receives social competence training (specified for schizophrenic patients as well).

Admission to groups is randomly.

Study Timeline

• Study Start: 2006-01
• Status Verified: 2008-10
• Study First Submitted: 2008-10-30
• Study First Submitted QC: 2008-10-30
• Study First Posted: 2008-10-31
• Primary Completion: 2009-06
• Study Completion: 2010-01
• Last Update Submitted: 2010-01-11
• Last Update Posted: 2010-01-12

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 50

Inclusion Criteria

• Clinical diagnosis of schizophrenia and disorders with psychotic features
• Misuse of cannabis during 12 months preceding admission to hospital

Exclusion Criteria

• Not able to attend training twice a week for 45 minutes (concentration, attention, psychotic symptoms, agitation)
• Discharge from hospital before completion of training

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
CG	Social competence Training	Control group
ACT	Cannabis-Consumption-Reduction-Training	Anti-Cannabis-Consumption-Training

Primary Outcome Measures

Name	Time	Method
PANSS Positive and Negative Symptom Scale	post intervention, six months follow-up

Secondary Outcome Measures

Name	Time	Method
Urinstatus for cannabinoids	weekly during and post intervention, follow-up

Trial Locations

Locations (1)

University of Konstanz; 🇩🇪 Konstanz, Baden-Württemberg, Germany