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Concussion may bring greater risks for athletes with ADHD

July 12, 2018

INDIANAPOLIS - Athletes who have attention deficit hyperactivity disorder (ADHD) may be at greater risk for experiencing persistent anxiety and depression after a concussion than people who do not have ADHD, according to a preliminary study released today that will be presented at the American Academy of Neurology's Sports Concussion Conference in Indianapolis, July 20 to 22, 2018. ADHD is a brain disorder that affects attention and behavior.

"These findings suggest that ADHD and concussion may have a cumulative effect on anxiety and depression beyond that of either ADHD or concussion alone," said study author Robert Davis Moore, MS, PhD, of the University of South Carolina in Columbia. "Athletes with ADHD should be monitored with this in mind, as they may be more susceptible to experience symptoms of depression and anxiety following a concussion."

The study involved 979 NCAA Division I college athletes at the University of South Carolina. Information on ADHD diagnosis and any history of concussion was gathered, along with the athletes' scores on questionnaires measuring anxiety and depression before the start of athletes' sporting seasons.

Athletes were divided into four groups: those with ADHD who also had experienced concussion; those with ADHD who had not experienced a concussion; those with concussion and no ADHD; and those with neither a history of concussion nor ADHD.

The researchers found that athletes with both ADHD and concussion had significantly higher scores on the tests for anxiety and depression than any of the other groups. Moore noted that athletes with a history of concussion were evaluated six or more months after the injury, indicating that the differences lasted longer than what might be expected in the weeks after the concussion.

Athletes with ADHD but no history of concussion did not show increased anxiety or depression.

The anxiety test asks people how often they agree with statements such as "I am tense; I am worried" and "I worry too much over something that really doesn't matter," with answers ranging from "Almost never" to "Almost always." Scores range from 20 to 80. The athletes with both concussion and ADHD had average scores of 42 on the test, compared to an average score of 33 for the other three groups.

The depression test asks how often during the past week people have agreed with statements such as "I did not feel like eating; my appetite was poor" and "I felt that everything I did was an effort," with answers ranging from "Rarely or none of the time (less than 1 day)" to "Most or all of the time (5-7 days)." Scores range from zero to 60, with scores of 16 or higher indicating that a person may be at risk for clinical depression. The athletes with both concussion and ADHD had average scores of 26, compared to an average score of 16 for the other three groups.

A limitation of the study is that it is cross-sectional, which means it looks at one point in time and does not show cause and effect. Moore said additional research is needed with multiple tests both before and after any concussions occur.
-end-
The study was supported by the University of South Carolina Athlete Performance, Health and Wellness Program.

Learn more about concussion at http://www.BrainandLife.org, the American Academy of Neurology's free patient and caregiver magazine and website focused on the intersection of neurologic disease and brain health. Follow Brain & LifeTM on Facebook, Twitter and Instagram.

To learn more about the AAN's Sports Concussion Guideline and access resources, visit https://www.aan.com/concussion.

The American Academy of Neurology is the world's largest association of neurologists and neuroscience professionals, with over 34,000 members. The AAN is dedicated to promoting the highest quality patient-centered neurologic care. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as Alzheimer's disease, stroke, migraine, multiple sclerosis, concussion, Parkinson's disease and epilepsy.

For more information about the American Academy of Neurology, visit http://www.aan.com or find us on Facebook, Twitter, Instagram, LinkedIn and YouTube.

Media Contacts:
Renee Tessman, rtessman@aan.com, (612) 928-6137
Carissa Jackson, cajackson@aan.com, (612) 928-6169

American Academy of Neurology

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