Trends in Attention Deficit Hyperactivity Disorder Ambulatory Diagnosis and Medical Treatment in the United States, 2000–2010

Objectives: Because of several recent clinical and regulatory changes regarding Attention Deficit Hyperactivity Disorder (ADHD) in the United States, we quantified changes in ADHD diagnosis and medication management from 2000 through 2010. Methods: We used the IMS Health National Disease and Therapeutic Index™, a nationally representative audit of office-based providers, to examine aggregate trends among children and adolescents under 18. We also quantified how diagnosis and treatment patterns have evolved based on patient and physician characteristics and the therapeutic classes used. Results: From 2000 to 2010, the number of physician outpatient visits where ADHD was diagnosed increased 66% from 6.2 million [M] (95% confidence intervals [CI] 5.5- 6.9M) to 10.4M visits (CI 9.3-11.6M). Of these visits, psychostimulants have remained the dominant treatment, used in 96% of treatment visits in 2000 and 87% of treatment visits in 2010. Atomoxetine use declined from 15% of treatment visits upon product launch in 2003 to 6% of treatment visits by 2010. The use of potential substitute therapies – clonidine, guanfacine, and bupropion – remained relatively constant (between 5-9% of treatment visits) during most of the period examined. Over this period, the ADHD management shifted towards psychiatrists (from 24% to 36% of all visits) without large changes in illness severity or the proportion of ADHD treatment visits accounted for by males (73%-77%). Conclusions: In ten years, the ambulatory diagnosis of ADHD increased by two-thirds and is increasingly managed by psychiatrists. The effects of these changing treatment patterns on children's health outcomes and their families are unknown