Attention Deficit Hyperactivity Disorder

Authored by Dr Colin Tidy, 03 May 2017

Patient is a certified member of
The Information Standard

Reviewed by:
Dr Adrian Bonsall, 03 May 2017

Attention deficit hyperactivity disorder (ADHD) is defined as a persistent pattern of inattention and/or hyperactivity-impulsivity. Impulsivity means having difficulty staying focused, and also being disorganised. Hyperactivity means being too active in a situation.

What is ADHD?

Attention deficit hyperactivity disorder (ADHD) is a condition that is much talked about but still not very well understood. It is a problem with behaviour that can range from mild to severe. For some children, ADHD can cause severe problems, especially if treatment isn't started early. Early diagnosis is therefore very important.

It can be very difficult to tell the difference between a child with ADHD and a 'naughty' and 'disruptive' child and so the diagnosis of ADHD needs a thorough assessment by a specialist. If psychological therapy, and sometimes also medication, is started early then this can greatly improve your child's life and future.

How common is it?

Attention deficit hyperactivity disorder (ADHD) is thought to affect about 1 in 20 children in the UK. About three times as many boys as girls are diagnosed with ADHD. However, some experts think that boys are more likely to be referred and get a diagnosis. That's because, compared with girls, they are hyperactive more often, which is more disruptive to others. A girl with the inattention type of ADHD may be dismissed as a lazy daydreamer. A boy who constantly disrupts the whole class may be harder to miss.

Although ADHD is most often diagnosed in children aged 3-7 years, it may not be recognised until much later in life. Sometimes it's not diagnosed until adulthood.

What is the outlook for children with ADHD?

Without treatment, children with attention deficit hyperactivity disorder (ADHD) are up to 100 times more likely to be excluded from school. ADHD is one of the main risk factors for criminal offending during childhood.

One review of research studies found that in people aged 25 years who had been diagnosed as having ADHD as children:

  • About 15 in every 100 were still diagnosed as having ADHD.
  • About 65 in every 100 had improved (partial remission) but still had symptoms and difficulties because of ADHD.

Children with ADHD are also more likely to have other problems as adults, such as unemployment, relationship difficulties, substance misuse and involvement in crime. But the good news is that early treatment does help to reduce the long-term impact of ADHD.

Further reading and references

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