Publication: La Lista de Verificación del Trastorno de Estrés Postraumático (PCL) en víctimas del terrorismo: análisis comparativo de las propiedades psicométricas de su aplicación telefónica frente a presencial
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2021-10-18
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Sociedad Española para el Estudio de la Ansiedad y el Estrés (SEAS)
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Abstract
Introducción y objetivos. En muchas situaciones tales como las de confinamiento provocadas por la pandemia de la COVID 19, es imposible aplicar los instrumentos psicológicos presencialmente, como originalmente se concibieron. Sin embargo, el modo de aplicación puede afectar a las propiedades psicométricas de las medidas de un instrumento. La Lista de Verificación del Trastorno de Estrés Postraumático (del inglés PTSD Checklist; en adelante PCL) es uno de los instrumentos más utilizados para evaluar presencialmente la sintomatología del trastorno de estrés postraumático (TEPT). Este es el primer estudio que analiza y compara la estructura factorial, consistencia interna y validez diagnóstica, nomológica y de grupos contrastados de las medidas de la PCL aplicada presencial y telefónicamente.
Material y métodos. Se administró la PCL en ambos formatos a una muestra de 634 personas víctimas del terrorismo junto con una entrevista diagnóstica estructurada y medidas de depresión y ansiedad.
Resultados. Las puntuaciones de ambas formas de aplicación de la PCL presentan una misma estructura unifactorial, índices excelentes de consistencia interna (alfa > .90) e índices muy buenos de validez diagnóstica para identificar el TEPT (AUC > .90); ambas discriminan significativamente y con tamaños del efecto grandes (d = 0.88–2.84) entre víctimas con TEPT, con trastornos depresivos o de ansiedad y sin trastornos, y ambas presentan correlaciones significativas y grandes con medidas de otros constructos con los que el TEPT guarda una estrecha relación: depresión y ansiedad.
Conclusiones. Los resultados sugieren que la PCL se puede aplicar telefónicamente con las mismas garantías psicométricas que presencialmente.
Introduction and objectives. In many situations, such as confinement situations caused by the COVID-19 pandemic, it is not possible to administer psychological instruments in person, as originally contemplated in their development. However, the mode of administration can affect the psychometric properties of instrument scores. The PTSD Checklist (PCL) is one of the most widely used instruments for assessing the symptoms of posttraumatic stress disorder (PTSD) in person. This study is the first research that has analyzed and compared the factorial structure, the internal consistency, the validity of contrasted groups, the diagnostic validity, and the nomological validity of scores on the PCL administered in person and by telephone. Material and methods. The PCL was administered in both application modes to a sample of 634 victims of terrorism along with a structured diagnostic interview and measures of depression and anxiety. Results. Scores on both administration modes of the PCL have the same unifactorial structure, excellent indexes of internal consistency (alpha > .90) and very good indexes of diagnostic validity to identify the PTSD (AUC > .90), discriminate significantly and with large effect sizes (d = 0.88–2.84) between victims with PTSD, with depressive or anxiety disorders and without disorders, and present significant and large correlations with measures of other constructs with which PTSD is closely related, namely depression and anxiety. Conclusions. The results suggest that the PCL can be administered over the telephone with the same psychometric guarantees as in person.
Introduction and objectives. In many situations, such as confinement situations caused by the COVID-19 pandemic, it is not possible to administer psychological instruments in person, as originally contemplated in their development. However, the mode of administration can affect the psychometric properties of instrument scores. The PTSD Checklist (PCL) is one of the most widely used instruments for assessing the symptoms of posttraumatic stress disorder (PTSD) in person. This study is the first research that has analyzed and compared the factorial structure, the internal consistency, the validity of contrasted groups, the diagnostic validity, and the nomological validity of scores on the PCL administered in person and by telephone. Material and methods. The PCL was administered in both application modes to a sample of 634 victims of terrorism along with a structured diagnostic interview and measures of depression and anxiety. Results. Scores on both administration modes of the PCL have the same unifactorial structure, excellent indexes of internal consistency (alpha > .90) and very good indexes of diagnostic validity to identify the PTSD (AUC > .90), discriminate significantly and with large effect sizes (d = 0.88–2.84) between victims with PTSD, with depressive or anxiety disorders and without disorders, and present significant and large correlations with measures of other constructs with which PTSD is closely related, namely depression and anxiety. Conclusions. The results suggest that the PCL can be administered over the telephone with the same psychometric guarantees as in person.