Cohort of Adolescents Treated for Cannabis Abuse and Addiction FRESH-PEF4363-en Bruno FALISSARD Cohort of Adolescents Treated for Cannabis Abuse and Addiction INCANT FRESH-PEF4363-en 4363 FRESH-PEF4363 Céline JOUANNE Bruno FALISSARD Olivier PHAN INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE (INSERM) Epidemiology France Portal (PEF) null Céline;JOUANNE Bruno;FALISSARD Olivier;PHAN protocol family therapy cannabis treatment abuse adolescent assessment Paediatrics Psychiatry Addiction medicine Disorders due to addictive behaviours Behavioral determinants: Addiction Socio-demographic and economic determinants Behavioral determinants To assess the interest in a specific therapy; Multidimensional Family Therapy (MDFT) is given to adolescents who are misusing or addicted to cannabis. To develop a therapeutic method in the European context, especially in France, that is effective in the field of adolescent addiction; to develop psychotherapy evaluation methods. null France Netherlands Germany Switzerland Belgium Individuals Patients population Male Female Presenting with a diagnosis for cannabis abuse and addiction and to having at least one parent (or legal guardian) agreeing to participate in the treatment and study. It should be noted that the misuse of psychoactive substances, behavioural and/or psychiatric disorders often associated with cannabis do not constitute grounds for exclusion. Clinical data Participant-reported health data Paraclinical data (non-biological) : Other Health event/morbidity Other Through organizations (health services or institutions schools businesses etc.) < 500 individuals Self-administered questionnaire Interview with the participant (including clinical) Observational Study Observational Study Cohort study 150 Unknown Restricted access Contact the principal investigator Access on specific project only