Current drug use, abuse and dependence among adults with versus without childhood ADHD, stratified by substance use disorder prior to 18 years of age.

OR, odds ratio; CI, confidence interval.†Drug (non-alcohol) substances include the following: stimulants, cocaine, narcotics, hallucinogens, inhalants, marijuana, and tranquilizers. In order to create mutually exclusive categories, each individual’s overall current non-alcohol substance use status was classified as the most severe status among all substances.‡Adjusted for age and gender.*Adjusted for age.Current drug use, abuse and dependence among adults with versus without childhood ADHD, stratified by substance use disorder prior to 18 years of age.