Attention deficit hyperactivity disorder (ADHD) is the most common neurobehavioral disorder diagnosed in U.S. children (1). While this disorder is most often diagnosed in children when they are in elementary school, it is increasingly being identified in preschool children (2-5). This report describes the prevalence of diagnosed ADHD among…

We investigated whether minority children attending U.S. elementary and middle schools are disproportionately represented in special education. We did so using hazard modeling of multiyear longitudinal data and extensive covariate adjustment for potential child-, family-, and state-level confounds. Minority children were consistently less likely…