Investigating Reasons for Later or Missed ADHD Diagnosis in Young People: A Population Cohort Study

This UK population study of nearly 10,000 young people examined why some individuals, especially females, receive ADHD diagnoses later or not at all. Researchers compared behavioral, emotional, cognitive, and family characteristics between those diagnosed early (ages 5-7), late (ages 11-14), and those with unrecognized ADHD, finding that earlier-diagnosed individuals had more severe peer, conduct, and emotional difficulties.