Confirmatory factor analysis of the Inventory of Statements About Self‐injury in a Spanish clinical sample

Objectives The main aim of the present study was to confirm the two‐factor structure of the Inventory of Statements About Self‐injury‐ Part II (ISAS‐II), analyze its psychometric properties and test–retest reliability of Parts I and II of the ISAS. Method The sample was composed of 355 Spanish participants diagnosed with eating disorders or borderline personality disorder (mean age 27.89, standard deviation = 13.31; 315 women, 40 men). Two models proposed for the ISAS‐II were analyzed by means of confirmatory factorial analysis. Results A two‐factor model was confirmed, and a model with self‐care included in the intrapersonal factor was preferable. The ISAS‐II showed positive correlations with emotional dysregulation. Test–retest reliability showed statistically significant correlations at 7 months (n = 123). Conclusion The ISAS‐II is a valid instrument to assess nonsuicidal self‐injury in Spanish populations, making it possible to assess these behaviors, which require valid and reliable measures worldwide.