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
Jan 17, 2023

Assessment. Advance online publication.

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.