Associations between driving under the influence or riding with an impaired driver and future substance use among adolescents.

Conclusions: RWID and DUI are significantly associated with greater alcohol and marijuanause over time. This study highlights that teens may be at higher risk for problem substance use in the future even if they ride with someone who is impaired. Prevention and intervention efforts for adolescents need to address both driving under the influence and riding with an impaired driver to prevent downstream consequences.