Description

This is a three-phase, observational psychometric validation study of the Spanish versions of the Suicide Crisis Inventory-Revised (SCS-2) and the Suicidal Crisis Syndrome Checklist (SCS-C), administered to adult psychiatric inpatients hospitalized for recent suicidal behavior at the Complejo Asistencial Dr. Sótero del Río (CASR), Chile. The study follows established guidelines for the translation, cultural adaptation, and validation of health-related instruments. Phase one involves linguistic validation through forward-backward translation by bilingual experts. Phase two consists of a pilot test of the pre-final versions with 10 patients to assess item clarity and cultural relevance. Phase three uses a prospective cohort design with 60 participants to evaluate psychometric properties. Assessments are conducted at admission and discharge and include the SCS-2 and SCS-C (Spanish versions), the Mini International Neuropsychiatric Interview (MINI), the Sheehan Disability Scale (SDS), and the Sheehan Suicidality Tracking Scale (S-STS). A subset of participants will complete the SCS-2 twice within a short time interval to assess test-retest reliability and will be evaluated by two independent raters for interrater reliability. Follow-up at 7 and 30 days post-discharge includes phone interviews and chart reviews to assess suicidal behavior outcomes. A sample size of 60 was selected based on prior studies to ensure sufficient power to evaluate internal consistency (Cronbach's α ≥ 0.80), factor structure, and interrater reliability (Cohen's κ ≥ 0.60). Statistical analyses will include Cronbach's alpha and item-total correlations for internal consistency, exploratory and confirmatory factor analysis (EFA/CFA) for construct validity, Pearson or Spearman correlations with SDS and S-STS for convergent validity, point-biserial correlations with MINI diagnoses for discriminant validity, ICC and Cohen's kappa for interrater reliability, ICC for test-retest reliability, and ROC curve analysis for predictive validity. Data will be collected electronically via Qualtrics, which includes built-in logic checks and skip patterns. Source data verification will be performed through cross-checks with clinical records and dual entry of outcome events. A detailed data dictionary outlines all variables, coding schemes, and response formats. Procedures are standardized through SOPs covering recruitment, consent, data collection, follow-up, and confidentiality. Missing data will be addressed through multiple imputation and sensitivity analyses. Data monitoring is performed internally, and adverse events or protocol deviations are reported to the Institutional Ethics Committee. This is the first study to validate the SCS-2 and SCS-C in a Spanish-speaking Latin American population and is expected to contribute to scalable, evidence-based suicide risk assessments in acute psychiatric settings.