Psychometric Properties of the Persian Version of the Suicide Resilience Inventory in Adolescents with Suicidal Ideation

Background: Resilience has been reported to significantly reduce the likelihood of engaging in risky behaviors following trauma or other adverse life events. Objectives: This study aimed to examine the psychometric properties of the Suicide Resilience Inventory-25 (SRI-25) as a protective factor against suicidal behaviors in a sample of Iranian adolescents. Materials and Methods: This cross-sectional study involved 923 students from lower and upper secondary schools in Lorestan province. From approximately 12,000 students, participants were selected using a cluster random sampling method. The Suicide Probability Scale (Cull and Gill, 1982) was initially administered, and students scoring in the high-risk range (n = 923) were purposively included. To validate the SRI-25, exploratory factor analysis (EFA) was performed on a subsample of 300 students, while confirmatory factor analysis (CFA) was conducted on another group of 618 students. For discriminant validity, 121 adolescents with and without a history of suicide attempts were compared. The study also assessed divergent and concurrent validity using the Persian versions of the Beck Hopelessness Scale, Suicide Probability Scale, and Hospital Anxiety and Depression Scale (HADS). All statistical analyses were conducted using SPSS version 26 and Mplus version 8.3. Results: The SRI-25 demonstrated significant negative correlations with anxiety, depression, and suicide probability (P < 0.001). Cronbach’s alpha coefficients indicated good internal consistency for all subscales: Internal protection (α = 0.90), emotional stability (α = 0.93), and external protection (α = 0.87), as well as for the total scale (α = 0.92). The three-factor structure of the SRI-25 was supported by CFA, consistent with the original version. Logistic regression analysis showed that the SRI-25 and its subscales correctly classified 87.6% of attempters and 83.5% of non-attempters, with an overall accuracy of 85.5%. Conclusions: The findings support the SRI-25 as a valid and reliable instrument for assessing suicide resilience based on three defined dimensions among Iranian adolescents.