Aduen PA, et al. - In view of the association of ADHD with automobile crashes, traffic fatalities, and serious road trauma, researchers here investigated if this risk is driven by ADHD symptoms specifically, and is unique to ADHD or transdiagnostic across psychiatric disabilities, such as depression, that also has concentration problems as core symptoms. In this work, ADHD symptoms portended 5% increased crash risk per increase in symptom severity score. Analyses based on self-reported clinical status indicated similarly elevated rates for ADHD and depression that may be related, in part, to both groups' inattention/concentration symptoms. ADHD usual treatment did not reduce this risk, however, this risk varied according to antidepressant medication status.