A recent study by psychologists at the University of California, Los Angeles and the University of South Carolina, Columbia found that children with attention-deficit/hyperactivity disorder (ADHD) were significantly more likely to develop drug addictions as adults. Compared to children without the disorder, researchers concluded ADHD made addiction to nicotine three times more likely, cocaine twice as likely, and marijuana 1.5 times more likely. One UCLA researcher estimated 5 to 7% of school-age children are affected by the condition. The rise in ADHD among youth has been a major source of concern and speculation for the past few years.
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