CANABIC: CANnabis and Adolescents: effect of a Brief Intervention on their Consumption - study protocol for a randomized controlled trial. - Archive ouverte HAL Access content directly
Journal Articles Trials Year : 2014

CANABIC: CANnabis and Adolescents: effect of a Brief Intervention on their Consumption - study protocol for a randomized controlled trial.

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Gilles Tanguy
  • Function : Author
  • PersonId : 952221
Paul Frappé
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  • PersonId : 952222
David Costa
Yoann Gaboreau
Mélanie Badin
Gilles Clément
  • Function : Author
  • PersonId : 952225
Pierre-Michel Llorca
  • Function : Author
  • PersonId : 900552

Abstract

BACKGROUND: Cannabis is the most consumed illegal substance in France. General practitioners (GPs) are the health professionals who are most consulted by adolescents. Brief intervention (BI) is a promising care initiative for the consumption of cannabis, and could be a tool for GPs in caring for adolescents who consume cannabis. The aim of the CANABIC study is to measure the impact of a BI carried out by a GP on the consumption of cannabis by adolescents of 15 to 25 years of age. METHODS: A randomized clustered controlled trial, stratified over three areas (Auvergne, Languedoc-Roussillon, and Rhone-Alps), comparing an intervention group, which carries out the BI in consultation, and a control group, which ensures routine medical care. The main assessment criterion is the consumption of cannabis by amount of joints per month, at 12 months. The amount necessary to highlight a significant difference between the two groups of 30 % of consumption at 12 months is 250 patients (50 GPs, 5 patients per GP; risk alpha = 5 %; power = 90 %; intra-cluster correlation coefficient rho = 0.2; Hawthorne effect = 15 %; lost to follow-up rates for GPs = 10 % and for patients = 20 %). This plan is replicated for the three areas, and therefore a total of 750 patients are expected.The secondary criteria for judgment are the associated consumption of tobacco and alcohol, the perception of the consequences of consumption, and the driving of a vehicle following consumption. DISCUSSION: Research about BI for young cannabis users is underway. The aim of the CANABIC study is to validate a BI suited to adolescents who consume cannabis, which may be performed in the general practice. This would provide a tool for their treatment by a GP, which could be widely distributed during initial or further medical training.Trial registration: CANABIC is a randomized clustered trial (NCT01433692, registered 2011 Sept 12), PHRC funded: Clinical Research Hospital Program (Governmental Fund, Health Ministry). Date first patient randomized: March 2012.
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inserm-00943521 , version 1 (07-02-2014)

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Catherine Laporte, Hélène Vaillant-Roussel, Bruno Pereira, Olivier Blanc, Gilles Tanguy, et al.. CANABIC: CANnabis and Adolescents: effect of a Brief Intervention on their Consumption - study protocol for a randomized controlled trial.. Trials, 2014, 15 (1), pp.40. ⟨10.1186/1745-6215-15-40⟩. ⟨inserm-00943521⟩
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