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CANDIS-II: Evaluation of the Cognitive-behavioral Treatment Programme CANDIS (CANDIS-II)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified August 2009 by Technische Universität Dresden.
Recruitment status was:  Active, not recruiting
ClinicalTrials.gov Identifier:
First Posted: May 7, 2008
Last Update Posted: August 26, 2009
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Federal Ministry of Health
Information provided by:
Technische Universität Dresden
The purpose of this study is to evaluate the effectiveness of the cognitive-behavioral treatment program CANDIS among n=450 patients with cannabis use disorders in a mulicenter randomized-controlled clinical trial (n=11 outpatient treatment centers).

Condition Intervention Phase
Cannabis Use Disorders Behavioral: Cognitive-behavioral treatment Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Evaluation of the Cognitive-behavioral Treatment Programme CANDIS in the German Outpatient Treatment Service System (CANDIS-II)

Resource links provided by NLM:

Further study details as provided by Technische Universität Dresden:

Primary Outcome Measures:
  • abstinence, defined as no evidence of cannabis use during the past 4 weeks as evidenced by self report and a negative urine screen; number of times a cannabis product was used in the past 4 weeks; retention rate [ Time Frame: at the end of treatment ]

Estimated Enrollment: 450
Study Start Date: May 2008
Estimated Study Completion Date: October 2009
Estimated Primary Completion Date: October 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
Individual psychotherapy including cognitive behavioral components, motivational interviewing techniques and case management
Behavioral: Cognitive-behavioral treatment
10 sessions of individual psychotherapy including cognitive-behavioral treatment, motivational enhancement and a psychosocial problem training.
Other Name: delayed treatment control group
No Intervention: 2
Delayed treatment control group


Information from the National Library of Medicine

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Ages Eligible for Study:   16 Years and older   (Child, Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • motivation to change cannabis use
  • age 16 or older
  • current (12 mth) regular cannabis use (at least 2 days a week)
  • informed consent to the study procedures and assessments

Exclusion Criteria:

  • current alcohol or any illicit drug dependence syndrome according to DSM-IV other than due to cannabis
  • lifetime history of any psychotic disorder
  • current severe episode of Major depression
  • current panic-agoraphobic disorder (severe)
  • severe learning disability, brain damage or pervasive developmental disorder
  • currently acute suicidality
  • not fluent in german language
  • any other current treatment for cannabis use disorders
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00673647

Psychosoziale Beratungs- und Behandlungsstelle für Suchtgefährdete und -kranke
Bautzen, Germany, 02625
LogIn Jugend- und Suchtberatung
Berlin, Germany, 10585
Therapieladen e.V.
Berlin, Germany, 10783
Jugend- und Drogenberatung Braunschweig
Braunschweig, Germany, 38102
Jugend- und Drogenberatung Dresden
Dresden, Germany, 01219
Die Boje - Suchtberatung und Behandlung
Hamburg, Germany, 20146
Drobs Hannover
Hannover, Germany, 30159
Caritas-Fachambulanz für junge Suchtkranke
Muenchen, Germany, 80335
Suchtambulanz der LWL-Klinik Münster
Muenster, Germany, 48147
Caritas Fachambulanz für Suchtprävention und Rehabilitation Osnabrück
Osnabrueck, Germany, 49074
Release Stuttgart e.V. & Ambulante Beratungs- und Behandlungsstelle Klinikum Stuttgart
Stuttgart, Germany, 70190
Sponsors and Collaborators
Technische Universität Dresden
Federal Ministry of Health
Study Director: Hans-Ulrich Wittchen, PhD Technische Universitaet Dresden
Study Director: Gerhard Buehringer, PhD Technische Universitaet Dresden
Principal Investigator: Eva Hoch, PhD Technische Universitaet Dresden
  More Information

Additional Information:
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: PhD Eva Hoch, Technische Universitaet Dresden
ClinicalTrials.gov Identifier: NCT00673647     History of Changes
Other Study ID Numbers: IIA5-2507DSM407
First Submitted: May 1, 2008
First Posted: May 7, 2008
Last Update Posted: August 26, 2009
Last Verified: August 2009

Keywords provided by Technische Universität Dresden:
efficacy of CBT for cannabis use disorders

Additional relevant MeSH terms:
Marijuana Abuse
Substance-Related Disorders
Chemically-Induced Disorders
Mental Disorders