Thirteen-Year-old Sophia was recently diagnosed with ADHD, inattentive presentation. Which of the following is unusual about this diagnosis?

It is not unusual for a thirteen-year-old to be diagnosed with ADHD, inattentive presentation. However, ADHD is typically diagnosed earlier in childhood, often around the age of 7. Therefore, it may be somewhat unusual for Sophia to have received this diagnosis for the first time at thirteen.