Increase in discipline referrals for substance use in Oregon middle schools after recreational marijuana legalized

A recent study has found that Oregon middle school students received office discipline referrals (ODRs) for substance use offenses 30% more often after legalization of recreational marijuana relative to comparison schools in other states over the same period (school years 2012/2013–2018/2019). There were no statistically discernable changes in high school ODRs. Recreational use by adults was legalized in Oregon in 2015.