CONCLUSIONS AND RELEVANCE In this cross-sectional study, parental marijuana use was associated with increased risk of substance use among adolescent and young adult offspring living in the same household. Screening household members for substance use and counseling parents on risks posed by current and past marijuana use are warranted.
JAMA Network Open. 2019;2(11):e1916015. doi: 10.1001/jamanetworkopen.2019.16015