Escala de Gravedad de Síntomas Revisada (EGS-R) del Trastorno de Estrés Postraumático según el DSM-5: propiedades psicométricas

Abstract

The Posttraumatic Stress Disorder (PTSD) Symptom Severity Scale-Revised is a 21-item structured interview based in DSM-5 criteria and intended to assess the severity of the symptoms of this mental disorder. This paper describes the psychometric properties of this instrument for assessing PTSD. The sample consisted of 526 patients who had been victims of sexual aggression or family violence and 193 people from the general population. The global instrument showed high internal consistency (alpha = .91), as well as good discriminant (g = 1.27) and concurrent validity (r(pb) = .78 with diagnosis of PTSD). The results of confirmatory factor analysis are presented and give support to the DSM-5 four symptom clusters. A cut-off point of 20, with a diagnostic efficacy of 82.48%, is appropriate to discriminate the victims with PTSD. The interview appears to be a sound instrument and should prove useful for treatment planning and research.