Head injury 'early marker' for ADHD

Head injury in young children is not a cause of attention deficit hyperactivity disorder (ADHD), but may be an early marker for the disorder, say US researchers.

For the study, researchers from the University of Utah investigated whether head injury before the age of two could increase the risk of ADHD in a group of 62,088 children.

The study found higher rates of ADHD among children who suffered a head injury than in non-injured children.

The researchers conclude that head injury does not appear to cause ADHD but some other factor appears to be associated with early head injury and the development of ADHD.

sanjay.tanday@haymarket.com

BMJ Online 2008

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