(Corvallis, OR) -- New research out of Oregon State University shows that when states legalize marijuana, young adults not in college become frequent users more often than college students. A study by OSU found that after legalization, use by non-college people aged 18 to 23 increased five-percent, while use by college students increased only one-percent. Non-college students also had an increase in cannabis use disorder. That's where people continue to use the drug despite the problems it causes in their lives. College students didn't have an increase in cannabis use disorder. The study was published in the American Journal of Preventative Medicine.