RT Journal Article SR Electronic T1 Cannabis and Young Users—A Brief Intervention to Reduce Their Consumption (CANABIC): A Cluster Randomized Controlled Trial in Primary Care JF The Annals of Family Medicine JO Ann Fam Med FD American Academy of Family Physicians SP 131 OP 139 DO 10.1370/afm.2003 VO 15 IS 2 A1 Laporte, Catherine A1 Vaillant-Roussel, Hélène A1 Pereira, Bruno A1 Blanc, Olivier A1 Eschalier, Bénédicte A1 Kinouani, Shérazade A1 Brousse, Georges A1 Llorca, Pierre-Michel A1 Vorilhon, Philippe YR 2017 UL http://www.annfammed.org/content/15/2/131.abstract AB PURPOSE Brief intervention to reduce cannabis is a promising technique that could be adapted for use in primary care, but it has not been well studied in this setting. We tested the efficacy of a brief intervention conducted by general practitioners among cannabis users aged 15 to 25 years.METHODS We performed a cluster randomized controlled trial with 77 general practitioners in France. The intervention consisted of an interview designed according to the FRAMES (feedback, responsibility, advice, menu, empathy, self-efficacy) model, while the control condition consisted of routine care.RESULTS The general practitioners screened and followed up 261 young cannabis users. After 1 year, there was no significant difference between the intervention and control groups in the median number of joints smoked per month among all users (17.5 vs 17.5; P = .13), but there was a difference in favor of the intervention among nondaily users (3 vs 10; P = .01). After 6 months, the intervention was associated with a more favorable change from baseline in the number of joints smoked (−33.3% vs 0%, P = .01) and, among users younger than age of 18, smoking of fewer joints per month (12.5 vs 20, P = .04).CONCLUSIONS Our findings suggest that a brief intervention conducted by general practitioners with French young cannabis users does not affect use overall. They do, however, strongly support use of brief intervention for younger users and for moderate users.