They may have become more or less pronounced with time but may have been present all the same.

American Psychiatric Association.What is ADHD?

National Institute of Mental Health.Attention-deficit/hyperactivity disorder in adults: What you oughta know.

A psychologist taking notes while talking to someone with ADHD

Vladimir Vladimirov / Getty Images

Substance Abuse and Mental Health Services Administration.Attention deficit hyperactivity disorder (ADHD).

Centers for Disease Control and Prevention.Attention-deficit/hyperactivity disorder (ADHD): Symptoms and diagnosis.

2020;51(5):315-335. doi:10.1055/s-0040-1701658