A new study revealed that number of children diagnosed with Attention Deficit Hyperactivity disorder or ADHD has risen sharply over the last decade.
ADHD, a disease commonly diagnosed in childhood, is marked by impulsivity and problems paying attention, sitting still and concentrating. Children afflicted with ADHD who are untreated often have difficulties in school and home.
The survey, conducted by the Department of Health and Human Services' National Center for Health Statistics, found the percentage of children ages 5 to 17 ever diagnosed with the disorder rose from 7% to 9% from 1998-2000 through 2007-2009. The survey found ADHD diagnoses varied by race, ethnicity and region. Mexican children had lower rates of diagnosis than other groups. Rates increased to 10% in parts of the South and Midwest.
While some critics have said that the condition was being over diagnosed there are further concerns about the safety of medications to treat ADHD, such as a possible increased risk of heart-related problems linked to stimulant use.
Earlier this week, scientists at the National Institute on Drug Abuse identified a specific dopamine receptor in the brain that appears to increase a person's risk of developing ADHD. The study was published in the journal Molecular Psychiatry.
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