Individuals meeting NSSI-Disorder (NSSI-D) criteria differ from those who do not on key psychological and behavioral factors. NSSI is strongly associated with suicide ideation and research suggests it may increase suicide risk by reducing fearlessness about death, aversion to death/self-injury, and altering cognitive biases toward suicide. However, limited research examines these differences. This study tested whether individuals meeting current NSSI-D criteria reported higher levels of fearlessness about death, suicide-related biases, suicide ideation and plans, and lower aversion to death than those not meeting criteria. Participants (N = 308; 83.4% female, 87.7% White, 28.9% current NSSI-D) with past-year NSSI or suicide ideation completed assessments in our research lab. Independent samples t-tests found significant group differences across all variables except fearlessness and aversion toward death. Hypotheses were partially supported. Aligning with prior work, those meeting NSSI-D criteria reported lower aversion to death and higher suicidal thoughts and behaviors than those not meeting criteria. Findings highlight the need for further research on NSSI-D’s role in suicide risk and intervention development.
