Anker E, et al. - The prevalence of co-morbid psychiatric disorders were investigated in adults with attention-deficit hyperactive disorder (ADHD). In addition, the correlations between educational level, work participation, social characteristics and the rates of psychiatric co-morbidities were determined. Adult ADHD exhibited a connection with high rates of co-morbid psychiatric disorders, regardless of gender and age. Higher education and work participation appeared to be associated with a lower probability of co-morbidity.