Jean Marc Guile

1 Introduction Non-Suicidal Self-Injury (NSSI), which refers to direct and deliberate damage to an individual’s own bodily tissue without suicidal intent (1), is a major mental health challenge among emerging adults (2, 3). In accordance with the Diagnostic and Statistical Manual of Mental Disorders (DSM-5-TR) (4), we use the term NSSI, which excludes self-injury with suicidal intent. If there is some intent to die present, it is classified as a suicide attempt.

1. Introduction Non-suicidal self-injury (NSSI) refers to the repetitive and intentional behaviors of damaging one’s own body tissues without an intent to die (1, 2). According to a meta-analysis covering the years 2010–2021, the estimated global lifetime prevalence of NSSI among a non-clinical sample of adolescents is 22.0%, while the estimated global 12-month prevalence rate is 23.2%.

Vladimir Adrien1,2*, Justine Liewig3, Thomas Diot1, Florian Ferreri1,2, Stephane Mouchabac1,2, Caroline Dubertret4 and Julie Bourgin3 1AP-HP, Department of Psychiatry, Saint-Antoine Hospital, Sorbonne Université, Paris, France 2Infrastructure for Clinical Research in Neuroscience (iCRIN), Paris Brain Institute, Sorbonne Université, INSERM, CNRS, Paris, France 3Department of Child and Adolescent Psychiatry, Nord-Essonne Hospital, Bures-sur-Yvette, France 4AP-HP, Department of Psychiatry, Louis...