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.
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