5. Differential diagnosis and other co-existing conditions

Overall perhaps as many as 65-70% of children with ADHD will have one or more co-morbid psychiatric or other conditions (Beiderman et al. 1991). Co-morbidity is therefore the rule rather than the exception. The assessment process should therefore take account of other conditions, which may better account for the behaviours causing concern. These might include:

The assessment process should also consider other conditions, which frequently exist alongside ADHD such as: