Psychometric properties of the Self-Injurious Thoughts and Behaviors Interview-Short Form among U.S. active duty military service members and veterans

Stanley, I. H., Marx, B. P., Fina, B. A., Young-McCaughan, S., Tyler, H. C., Sloan, D. M., Blankenship, A. E., Dondanville, K. A., Walker, J. L., Boffa, J. W., Bryan, C. J., Brown, L. A., Straud, C. L., Mintz, J., Abdallah, C. G., Back, S. E., Blount, T. H., DeBeer, B. B., Flanagan, J., Foa, E. B., Fox, P. T., Fredman, S. J., Krystal, J., McDevitt-Murphy, M., McGeary, D. D., Pruiksma, K. E., Resick, P. A., Roache, J. D., Shiroma, P., Taylor, D. J., Wachen, J. S., Kaplan, A. M., López-Roca, A. L., Nicholson, K. L., Schobitz, R. P., Schrader, C. C., Sharrieff, A.-F. M., Yarvis, J. S., Litz, B. T., Keane, T. M., & Peterson, A. L., for the STRONG STAR Consortium and the Consortium to Alleviate PTSD
Oct 3, 2023

Assessment, 30(7), 2332-2346. 

We assessed the interrater reliability, convergent validity, and discriminant validity of the Self-Injurious Thoughts and Behaviors Interview-Short Form (SITBI-SF) in a sample of 1,944 active duty service members and veterans seeking services for posttraumatic stress disorder (PTSD) and related conditions. The SITBI-SF demonstrated high interrater reliability and good convergent and discriminant validity. The measurement properties of the SITBI-SF were comparable across service members and veterans. Approximately 8% of participants who denied a history of suicidal ideation on the SITBI-SF reported suicidal ideation on a separate self-report questionnaire (i.e., discordant responders). Discordant responders reported significantly higher levels of PTSD symptoms than those who denied suicidal ideation on both response formats. Findings suggest that the SITBI-SF is a reliable and valid interview-based measure of suicide-related thoughts and behaviors for use with military service members and veterans. Suicide risk assessment might be optimized if the SITBI-SF interview is combined with a self-report measure of related constructs.