| The prevalence of attention-deficit/hyperactivity disorder in the worldwide pediatric population has been stable over the past 30 years except in the United States, where cases have increased. According to a 2016 parent survey, approximately 6.1 million US children (9.4%) had received a diagnosis of ADHD. Worldwide, ADHD is the third most common mental health disorder, following depression and anxiety. Overall, girls (5.6%) are less likely to be diagnosed with ADHD than boys (12.9%). A 2021 global systematic review and meta-analysis suggested that the prevalence of persistent adult ADHD was 2.58% and the prevalence of symptomatic adult ADHD was 6.76%, with 139.84 million and 366.33 million affected adults worldwide in 2020, respectively.4 ADHD appears to impact men more than women. In adults, ADHD appears to decrease as an individual ages. |
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