Multidimensional Suicide Inventory-28 (MSI-28) Within a Sample of Military Basic Trainees: An Examination of Psychometric Properties

Suicide and suicidal ideation are serious public health concerns. Accurate detection and assessment are critical first steps in addressing this challenging issue. The present study examined self-reported suicidal ideation in a sample of United States Air Force enlisted active duty basic trainees (N = 470) using the Multidimensional Suicide Inventory (MSI-28). Exploratory factor analyses revealed a 4-factor structure for the MSI-28 in this sample. Together, these 4 factors explained approximately 72% of the variance in the MSI-28. The MSI-28 evidenced moderate to strong associations with measures of resilience (Dispositional Resilience Scale-15; DRS-15) and psychological distress (Outcome Questionnaire; OQ-30.2). These findings demonstrate that the MSI-28 is a promising tool for clinical measurement of self-reported suicidality. Future directions for further validation of the MSI-28 are discussed.