Native American minors have the highest rate of substance use and abuse, compared to other ethnic groups.
African American and Asians aged 12 to 17 are at the opposite end of the scale with the lowest rate.
Duke University Medical Center researchers also found that almost four in every ten 12 to 17 year olds admit to using drugs or alcohol in the past year.
Marijuana was the most frequently used drug, followed by prescription painkillers.
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