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

Evaluation of the Cognitive-behavioral Treatment Programme CANDIS in the German Outpatient Treatment Service System (CANDIS-II)

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).

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