These results do not support existing hypotheses on the role of anxiety as either an exacerbating or protective factor for ADHD-related aggression. These results do not support existing hypotheses on the role of anxiety as either an exacerbating or protective factor for ADHD-related aggression. Clinical anxiety does not appear to moderate aggression directly in patients with attention-deficit hyperactivity disorder (ADHD), according to study results published in Psychiatry Research.