Add to ORKGSexual offending is a widespread international problem. Deviant sexual interests and antisocial orientation/lifestyle instability are identified as the primary criminogenic needs of sexual offenders. As a consequence, a proper understanding of these constructs is required for the supervision, (risk) assessment, and treatment of sexual offenders. The general aim of this dissertation was to explore to what extent various risk factors of (sexual) (re)offending are relevant for the (risk) assessment and treatment of sexual offenders detained by TBS-hospital order