Psychometric Properties of the Persian Version of the Suicide Crisis Questionnaire-2 in an Iranian Non-Clinical Population
Keywords:
Suicide, Suicide Crisis Questionnaire-2, Psychometrics, Validity, ReliabilityAbstract
Objective: This study aimed to examine the reliability and validity of the Persian version of the Suicide Crisis Questionnaire-2 (SCI-2) in an Iranian non-clinical population.
Methodology: This descriptive-correlational study was conducted on 651 individuals aged over 18 years living in Tehran Province during the 2024–2025 academic year, selected through convenience sampling. The localization process included translation, back-translation, face and content validity assessment, and a pilot study. Instruments included the SCI-2, Beck Scale for Suicide Ideation (BSSI), Patient Health Questionnaire-9 (PHQ-9), and Generalized Anxiety Disorder Scale (GAD-7). Data were analyzed using descriptive statistics, Cronbach’s alpha, intraclass correlation coefficient (ICC), and Pearson correlation.
Findings: Results demonstrated excellent internal consistency for the total SCI-2 (α=0.98), with subscale alphas ranging from 0.85 to 0.95. Test–retest reliability over a one-month interval was very high (ICC=0.99, p<0.001). Significant positive correlations were observed between SCI-2 scores and suicide ideation, depression, and anxiety (r=0.50–0.81, p<0.01), supporting strong convergent validity.
Conclusion: The Persian version of the SCI-2 shows excellent reliability and validity and can be considered a robust instrument for psychological screening, clinical research, and suicide prevention initiatives in Iran.
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