Impact of Comorbid Personality Disorder on the Risk of Involuntary Hospitalization in Patients Referred for Urgent Forensic Assessment: A Cross-Sectional Study.

Background/objectives: In Belgium, involuntary psychiatric hospitalization is authorized in the presence of certain criteria governed by the law relating to the protection of the mentally ill. The number of involuntary hospitalizations has been increasing continuously in recent years. Since personality disorders are frequent comorbidities in involuntarily hospitalized patients, the aim of this study was to investigate the potential role played by comorbid personality disorders in the decisions about involuntary hospitalization made during urgent forensic assessment.

Methods: A total of 565 individuals were retrospectively recruited from the database of urgent forensic assessment carried out in the Psychiatric Emergency Department. Logistic regression analyses were performed to investigate the risk of involuntary hospitalization associated with comorbid personality disorders in patients referred for urgent forensic assessment.

Results: 66.7% of urgent forensic assessments resulted in involuntary hospitalization. In addition, comorbid personality disorders (especially borderline personality disorder) were associated with a lower risk of involuntary hospitalization in patients referred for urgent forensic assessment.

Conclusions: In this study, we demonstrated that urgent forensic assessments frequently result in involuntary hospitalizations. Furthermore, this study highlighted that comorbid personality disorders (especially borderline personality disorder) appeared to have a major impact on the decision not to involuntarily hospitalize patients referred for urgent forensic assessment. These elements therefore justify the establishment of adequate clinical reflection to avoid the stigmatization related to these frequent comorbidities in patients at risk of involuntary hospitalization.