Background: Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder that is characterized by symptoms of inattention and/or hyperactivity/impulsivity that are developmentally inappropriate. The current diagnostic criteria for ADHD, as outlined in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) require the presence of at least 6 symptoms of inattention and/or 6 symptoms of hyperactivity/impulsivity for a minimum of 6 months, before the age of 12, and must impair function across multiple settings. Throughout the lifespan, attention-deficit/hyperactivity disorder (ADHD) is frequently comorbid with other psychiatric and somatic disorders, although the pattern of comorbidity changes over time (Franke et al., 2018). The most prevalent psychiatric comorbidities in childhood are other neurodevelopmental disorders (NDDs), such as autism spectrum disorders (ASD) (65–80%) and learning disorders ( over 45%) as well as externalizing conditions, including oppositional defiant disorder (ODD) (50 60%), and conduct disorder (CD) (20–50% in children and 40–50% in adolescents).