Propiedades psicométricas de la escala revisada del impacto del evento estresante (IES-R) en una muestra española de pacientes con cáncer

• Autores: Gema Costa Requena, Francisco Luis Gil Moncayo
• Localización: Análisis y modificación de conducta, ISSN 0211-7339, ISSN-e 2173-6855, Vol. 33, Nº. 149, 2007, págs. 311-332
• Idioma: español
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• Resumen
  • español

    La Escala del Impacto Esfresante y su versión revisada (IES-R) han sido utilizadas para evaluar sintomatología en trastornos de ansiedad. El objetivo de este estudio es analizar las propiedades psicométricas de la versión española del IESR y averiguar su punto de corte para discriminar malestar emocional significativo. Un total de 193 pacientes ambulatorios con cáncer cumplimentan la escala IES-R y se les evalúa con la entrevista psiquiátrica. Se realiza un análisis factorial exploratorio como aproximación a la estructura interna del cuestionario, seguido de un análisis factorial confirmatorio para calcular la bondad de ajuste de la dimensionalidad del cuestionario. La exactitud discriminatoria de una prueba para un determinado punto de corte se halla con la curva ROC (<

  • English

    The impact of event scale and the revised version (IES-R) have been used to assess cases with anxious disorders. The main objective in this study is to analyse the psychometric properties in the IES-R Spanish version, and to determine the cut-off score to detect cases with high level of distress. A total of 193 out-patients cancer completed the IES-R, and were assessed through a psychlatric interview. We did an exploratory factorial analysls to evaluate the internal structure in this scale, and a confilrmatory factorial analysis to determine the adjustment goodness of the dimensionality in this scale. The discriminatory exactitude of a scale for a cut-off score is determined through the receiving operate curve (ROC). In patients with cancer, the model with fit adjustment goodness ís composed by two dimensions: intrusion/ hyperactivation and avoidance (X2=166, 11; g.I:188), that explain 39,77% of the total variance. With the ROC ahalysls, the sensibility and specificity scores not offer an acceptable accuracy in the cut-off scores to detect clinical cases. The differences in the mean comparison between the total score of the IES-R in patients with psychiatric disorders (X=20,08; DS=1,27) and non-psychiatric diagnosis (X= 14, 4; DS=0,88) were significant (T=3,78;P<0,001). The IES-R is an instrument whit satisfactory psychometric properties but the factor structure of the translation in cancer patients was not similar to the proposed theoretical structure of the IES-R.