Centers for Disease Control and Prevention. ADHD is a chronic condition, beginning in early childhood and persisting throughout a person's lifetime. It has free parking in front, and the 99 B line stops there as well as the 3 main bus, 9, 8, and Diagnosis of the condition follows after one or several assessment interviews by a clinician including:. When your child has ADHD, anxiety,…. Results from the National Comorbidity Survey Replication".