A child must display behaviours from one of the three subtypes before age 7
These behaviours must be more severe than in other kids the same age
The behaviours must last for at least 6 months
The behaviours must occur in and negatively affect at least two areas of a child’s life (such as school, home, day-care settings, or friendships)
The behaviours must also not be linked to stress at home. Children who have experienced a divorce, a move, an illness, a change in school, or other significant life event may suddenly begin to act out or become forgetful. To avoid a misdiagnosis, it’s important to consider whether these factors played a role in the onset of symptoms
First, your child’s doctor will perform a physical examination of your child and ask you about any concerns and symptoms, your child’s past health, your family’s health, any medications your child is taking, any allergies your child may have, and other issues. This is called the medical history, and it’s important because research has shown that ADHD has a strong genetic link and often runs in families. Your child’s doctor may also perform a physical exam as well as tests to check hearing and vision so other medical conditions can be ruled out. Because some emotional conditions, such as extreme stress, depression, and anxiety, can also look like ADHD, you’ll probably be asked to fill out questionnaires that can help rule them out as well. You’ll also likely be asked many questions about your child’s development and his or her behaviors at home, at school, and among friends. Other adults who see your child regularly (like teachers, who are often the first to notice ADHD symptoms) will probably be consulted, too. An educational evaluation, which usually includes a school psychologist, may also be done. It’s important for everyone involved to be as honest and thorough as possible about your child’s strengths and weaknesses.
