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Non-Suicidal Self-Injury Within Offender Populations: A Systematic Review

Non-suicidal self-injury (NSSI), defined as deliberate self-directed tissue damage, presents a serious health concern for offender populations. Approximately one-third of offenders report a history of NSSI, and it is the most common reason for mental health treatment within correctional settings. To date, no review exists with a specific focus on NSSI in criminal justice contexts. Therefore, the primary aim of this article is to review research on NSSI within correctional settings. Specifically, we explore the role of risk factors for NSSI. We also examine the functions of NSSI within correctional contexts. In addition, we evaluate the evidence for potential assessment tools and treatments for NSSI. Taken together, our review suggests that risk factors for NSSI must be considered differently in correctional settings, due to the high base rates of these vulnerabilities. Further, although environmental control is a more salient function of NSSI within correctional settings, the primary motive for engaging in this behavior remains emotion regulation. Finally, despite the emergence of several promising treatments for NSSI within correctional settings, larger scale studies are necessary to determine the efficacy of these interventions.