Validity and reliability of the Spanish version of the Somatoform Dissociation Questionnaire: (SDQ-20)

• Ana Isabel González-Vázquez ^[1] ; Lucía del Río-Casanova ^[4] ; Natalia Seijo-Ameneiros ^[5] ; Paloma Cabaleiro-Fernández ^[6] ; Teresa Seoane-Pillado ^[2] ; Ania Justo-Alonso ^[7] ; Miguel Ángel Santed-Germán ^[3]
  1. [1] Complexo Hospitalario Universitario da Coruña

     Complexo Hospitalario Universitario da Coruña

     A Coruña, España

     
  2. [2] Instituto de Investigación Biomédica da Coruña

     Instituto de Investigación Biomédica da Coruña

     A Coruña, España

     
  3. [3] Universidad Nacional de Educación a Distancia

     Universidad Nacional de Educación a Distancia

     Madrid, España

     
  4. [4] Clínica Assistens (A Coruña)
  5. [5] Centro de Psicología y Trauma (Ferrol)
  6. [6] Centro de Psicoterapia (Ourense)
  7. [7] Clínica Assistens (Vigo)

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• Localización: Psicothema, ISSN-e 1886-144X, ISSN 0214-9915, Vol. 29, Nº. 2, 2017, págs. 275-280
• Idioma: inglés
• DOI: 10.7334/psicothema2016.346
• Títulos paralelos:
  • Validez y fiabilidad de la versión española del Somatoform Dissociation Questionnaire: (SDQ-20)
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• Dialnet Métricas: 2 Citas
• Resumen
  • español

    Antecedentes: SDQ-20 (Somatoform Dissociation Questionnaire) es un autoinforme que mide la presencia de disociación somatomorfa. Se analizan las propiedades psicométricas de la versión española de la SDQ-20 y su versión abreviada (SDQ-5). Método: su validez y fiabilidad han sido examinadas en una muestra de 360 pacientes: 38 trastorno disociativo (de conversión), 30 trastorno disociativo (psicomorfo) y 292 diagnosticados de otros trastornos. El diagnóstico de trastorno disociativo se realizó mediante la SCID-D-TR y una entrevista específica para los trastornos conversivos. Resultados: los sujetos que cumplieron criterios de trastorno disociativo o conversivo puntuaron significativamente más alto en la SDQ-20 (criterio de validez). La disociación psicomorfa y somatomorfa y el trauma temprano se correlacionaron significativamente (validez del constructo). Se obtuvieron un coeficiente alpha de 0.866 (fiabilidad) y una correlación test-retest de 0,91. El punto de corte para los trastornos disociativos fue 27,5 (sensibilidad 81,6% y especificidad 71%) y 29,5 para los trastornos conversivos (81,6% y 71%). En la SDQ-5 se obtuvo un coeficiente alpha de 0,561 y un punto de corte de 5,5 (sensibilidad 73,33% y especificidad 70,41%). Conclusiones: la versión española de la SDQ-20 presenta buenas propiedades psicométricas. La SDQ-5 muestra peores características y su uso en muestras españolas no se recomienda.

  • English

    Background: The Somatoform Dissociation Questionnaire (SDQ-20) is a self-reported questionnaire measuring somatoform dissociation. The aim of this study is to analyze the psychometric properties of the Spanish version of the SDQ-20 and its short version (SDQ-5). Methods: Validity and reliability were examined in a sample of 360 psychiatric outpatients: 38 dissociative (conversion) disorders, 30 dissociative (psychoform) disorders, and 292 patients suffering from other disorders. Dissociative disorders were diagnosed using the SCID-D and a specific interview for conversion disorders. Results: Subjects meeting criteria for any dissociative or conversion disorder scored significantly higher in the SDQ-20 (criterion validity). Somatoform dissociation, psychoform dissociation and early trauma were significantly correlated (construct validity). An alpha coefficient of .866 (reliability) and a test-retest correlation of 0.91 were obtained. The cut-off score maximizing sensitivity and specificity was 27.5 for psychoform dissociative disorders (sensitivity of 81.6% and specificity of 71.0%) and 29.5 for conversion disorders (81.6% and 71.0%). For the SDQ-5, the coefficient alpha was 0.561 and the selected cut-off score was 5.5 (sensitivity of 73.33% and specificity of 70.41%). Conclusions: The Spanish version of the SDQ-20 presents good psychometric properties while the SDQ-5 shows worse characteristics and its use with Spanish samples is not recommended.

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