A Validation Study of the Taiwanese Suicide Crisis Inventory Version 2 to Detect Suicidality in an Online Population Survey

Chia-Yi Wu ； Ming-Been Lee ； Megan L Rogers ； Chia-Ta Chan ； Chun-Ying Chen ； Jenelle Richards ； Igor Galynker

《Journal of Suicidology》 Vol.17 No.2 (2022/06) Pp. 124-133

https://doi.org/10.30126/JoS.202206_17(2).0004

摘要

Background: Early identification of near-term risk for suicide attempts is critical to provide timely intervention for at-risk individuals. The Suicide Crisis Syndrome describes a pre-suicidal mental state marked by entrapment, affective disturbances, loss of cognitive control, hyperarousal, and social withdrawal; accordingly, a self-report instrument, the Suicide Crisis Inventory Version 2 (SCI-2), was developed to measure the syndrome. The study aimed to examine the reliability and validity of the Taiwanese version of the SCI-2 to identify suicide risk among community residents. Methods: An anonymous online questionnaire survey with structured questions on suicide risks was conducted during April and May of 2021. The questionnaire contained demographics, SCI-2, and the 5-item Brief Symptom Rating Scale to measure psychological distress as well as suicidality (i.e., suicidal ideations and attempts). Confirmatory factor analyses (CFA) and internal consistency of the SCI-2 were performed. We also tested the convergent validity of the SCI-2 with the BSRS-5 and self-reported suicidal ideation and attempts. Stepwise multiple regression and receiver operating characteristic (ROC) curve analyses were used to examine the predictive validity of the SCI-2 for suicidal ideation. Results: In total, 4846 participants were recruited online with female predominance (82.6%). Results of the one-factor CFA with five-factor solutions for SCI-2 indicated good model fit. The SCI-2 total and subscale scores showed excellent internal consistency and good convergent validity with all items of the BSRS-5 and suicidality. Stepwise multiple regression revealed that entrapment and affective disturbance significantly explained 32.2% of the variance of one-week suicide ideation. The ROC curve demonstrated that the optimal cut-off of the SCI-2 could significantly identify the presence of one-week suicide ideation. Conclusion: The study revealed that the SCI-2 had good psychometric properties in terms of reliability and validity among the general adult population in Taiwan. Its predictive validity for future suicide risk needs further study.

關鍵字

suicide crisis syndrome ； revised Suicide Crisis Inventory (SCI-2) ； psychological distress ； BSRS-5 ； suicide ideation ； online survey