Prevalence of ADHD Among Nonpsychotic Patients of Day-Care Centers and Comparison of Psychiatric Comorbidities Among Persons With and Without ADHD: A Pilot Study.

Background/Objectives: Adults with ADHD are more likely to develop other mental disorders. There are few data on the prevalence of ADHD among nonpsychotic patients treated with psychotherapy in day-care centers. This paper aims to assess persons with ADHD in this specific population and to compare psychiatric comorbidities in groups with and without ADHD. Methods: A total of 152 persons (men and women aged 18-58 years [M = 33; SD = 9.56]) were diagnosed according to the Mini International Neuropsychiatric Interview 5.0. (MINI). Personality disorders were assessed with SCID-II. ADHD was diagnosed according to a structured diagnostic history, DSM-IV-TR criteria, as well as CAARS and ASRS questionnaires. Results: A total of 47 persons (31%) met the criteria for ADHD in adults. Individuals with and those without ADHD did not differ in terms of education, employment, earnings, functioning on the labor market, satisfaction with their material status, being in a relationship, and divorce rate. Patients with ADHD more often had comorbidities such as major depression (34%) and personality disorders (31.9%), while for those without ADHD, anxiety disorders (58.1%) were predominant. The prevalence of personality disorders was higher in the group with ADHD and approached statistical significance (χ2 [1, N = 152] = 18.496; p = 0.06). Borderline and passive-aggressive personality disorders were also more frequent in this group. Conclusions: The prevalence of ADHD among patients treated in the day-care psychiatric center was much higher than in general population. In the group with ADHD, there was a higher prevalence of personality disorders, mainly borderline and passive-aggressive types. As only a small sample was analyzed in this single-center study, the presented findings need replication in similar settings.