Late-onset ADHD divides psychiatrist opinion

Late-onset ADHD is a separate syndrome and not a continuation of childhood-onset ADHD, according to two studies that have sparked controversy among psychiatrists.

A UK study of 166 adults diagnosed with ADHD at 18 years old shows nearly 70% did not report symptoms during their childhood.

A comparison with patients whose childhood ADHD had persisted in adulthood, shows similarly high rates of impairment. However,