Identifying forensic psychiatric populations in national health registers: a Danish validation study

Key Points

• The study successfully validates administrative trajectory markers for identifying patients in forensic psychiatric care, improving research capabilities.
• Findings demonstrate the criterion concurrent validity of the Danish National Patient Register in tracking incident patients over time.
• Assessment of national health registries reveals critical insights for enhancing research in forensic psychiatry and improving patient care.
• This validation study emphasizes the importance of reliable data in forensic psychiatric research, potentially influencing policy and practice.