Brief motivational interviewing intervention to reduce alcohol and marijuana use for at-risk adolescents in primary care.

OBJECTIVE The primary care (PC) setting provides a unique opportunity to address adolescent alcohol and other drug (AOD) use. METHOD We conducted a randomized controlled trial in 4 PC clinics from April 2013 to November 2015 to determine whether a 15-min brief motivational interviewing (MI) AOD intervention, delivered in PC, reduced alcohol and marijuana use and consequences. Adolescents ages 12-18 who came for an appointment during the 2.5-year...