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Medicina Legal de Costa Rica

versión On-line ISSN 2215-5287versión impresa ISSN 1409-0015

Resumen

CONTRERAS-PEZZOTTI, Leddy; ARTEAGA-MEDINA, Juan  y  CAMPO-ARIAS, Adalberto. Criterion validity of the impact of event scale in colimbian violence-victimized women . Med. leg. Costa Rica [online]. 2007, vol.24, n.2, pp.99-106. ISSN 2215-5287.

Background: The Impact of Event Scale (IES) was designed to identify symptoms of post-traumatic stress in clinical settings. The IES showed high internal consistency in Colombian violence-victimized women. Although, it is necessary to determine the criterion validity for posttraumatic stress disorder (PTSD). Objective: To establish the criterion validity of IES for PTSD among violence-victimized women at Bucaramanga, Colombia. Method: In the present research participated 310 women between 18 and 65 years (mean = 31.6 years, SD = 10.7); the mean scholarship was 8.8 years (SD = 4.4); 59.1% were half- or full-time employees; 58.7% were married; 60.6% lived in low-class neibourghood; 52.3% reported have been victims of physical assault; and 26.8% informed that the aggressor was sexual partner. A trained nurse applied the 15-item version of IES (four-option Likert pattern answer) and a psychiatrist interviewed each woman to identify cases of DSM-IV-PTSD. Results: For the best cutoff point (46/75) of the EIE, the sensitivity was 65.5% (95%CI 56.1-73.9); specificity, 65.5% (95%CI 58.3-72.0); positive predictive value, 53.1% (95%CI 44.6-61.5); negative predictive value, 76.0% (95%CI 68.7-82.2); positive likelihood ratio, 1.9; negative likelihood ratio, 0.52; Cohen´s kappa, 0.296 (95%CI 0.190-0.402); and area under receiver operating characteristic curve, 0.697 (95%CI 0.639-0.755). Conclusions: The IES presents very modest concordance to PTSD diagnosis, according to DSM-IV criteria. The IES should not be used as a measure of PTSD in forensic settings.

Palabras clave : Post-traumatic stress disorder; Forensic psychiatry; Validation studies.

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