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At what age to diagnose ADHD

At what age can we tell whether a child has ADHD? Too early, and there is a risk of mistaking it for normal restlessness. Too late, and the child may have built up difficulties. Here are the landmarks to help you find your way. There is no ideal age, but there are useful markers depending on the stages of life.

Signs from childhood

The symptoms of ADHD appear in childhood. The diagnostic criteria require that several symptoms be present before the age of 12. The doctor looks for these signs in the child’s history.

However, they may only be noticed later.

Our article Signs of ADHD in children complements this advice.

Before the age of 6

In young children, restlessness and inattention are part of normal development. Diagnosis is therefore more delicate and calls for great caution. This caution helps avoid mistaking normal restlessness for a disorder.

The doctor often observes progress over several months.

To find out more, see Signs of ADHD in nursery school.

Starting primary school

Many cases of ADHD are identified between the ages of 6 and 10, when school demands increase: sitting still, concentrating, organising oneself. Teachers are often the first to notice the difficulties.

The article ADHD in Year 1 covers this question in detail.

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At secondary school

Some cases of ADHD, particularly the inattentive type, are only identified at secondary school, when organisation becomes more complex. Difficulties with organisation then become more visible.

This point is explained step by step in ADHD at secondary school.

In adulthood

It is never too late. Many adults are diagnosed after years of difficulties. The doctor then looks for signs present since childhood. This late diagnosis often brings great relief.

To go further, read our article Diagnosing ADHD in adulthood.

Why act early

Early identification makes it possible to put support in place before school difficulties and loss of confidence set in. The earlier the support, the more effective it is.

We detail this point in ADHD and self-esteem.

Acting without waiting for a diagnosis

Even before a diagnosis, adjustments and parent guidance can help the child and their family. This support is useful whatever the outcome of the assessment.

This subject is covered in our page Parent guidance and ADHD.

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Frequently asked questions

At what age can ADHD be diagnosed ?

Symptoms must be present before the age of 12, and diagnosis is more delicate before the age of 6. Signs appear in childhood.

Can you be diagnosed as an adult ?

Yes, it is never too late. Diagnosis is delicate before the age of 6.

Why act early ?

To limit school difficulties and preserve the child’s confidence. It is never too late.

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