A new study by the Centers of Disease Control and Prevention (CDC) found that children in the U.S. foster system are three times more likely than non-foster children to have a diagnosis of ADHD. About half of these children had an additional diagnosis, such as depression, anxiety, or oppositional defiant disorder, compared with about a third of children with ADHD who were not in foster care.

The researchers were not surprised by the diagnosis statistics, but were heartened by the findings on treatment. The children were more likely than their non-foster peers to be receiving psychological services in conjunction with ADHD medication.