Psychometric Properties of the Spanish Version of the Pain Anxiety Symptoms Scale-20 (PASS-20-SV).

BACKGROUND: The PASS-20 is a general measure of pain-related anxiety and fear. The aim of the present study was to adapt the questionnaire for use in Spanish-speaking populations. METHODS: Sample 1 comprised 216 individuals with chronic spinal pain (114 women and 102 men); sample 2 comprised 85 individuals with acute spinal pain (62 women and 23 men). The dimensionality of the PASS-20-SV items was evaluated using Exploratory Factor Analysis and an optimal implementation of Parallel Analysis (robust maximum likelihood). Data from sample 1 was used to analyse internal consistency and convergent validity. Estimated test-retest stability and predictive validity were based on data from the sample 2 participants, who completed the first administration (T1) and a second administration (T2, 6 months later). RESULTS: The PASS-20-SV comprises two factors: pain-related anxiety and apprehension, and pain-related fear and avoidance. It has good to excellent reliability and adequate test-retest stability. The results support its convergent and predictive validity. CONCLUSIONS: The Spanish Version of the PASS-20 is a valid, reliable measure of pain-related anxiety and pain-related fear in Spanish-speaking patients.

Psychometric Properties of the Spanish Version of the Pain Anxiety Symptoms Scale-20 (PASS-20-SV) / Propiedades Psicométricas de la Versión Española de la Pain Anxiety Symptoms Scale-20 (PASS-20-SV)

Background: The PASS-20 is a general measure of pain-related anxiety and fear. The aim of the present study was to adapt the questionnaire for use in Spanish-speaking populations. Methods: Sample 1 comprised 216 individuals with chronic spinal pain (114 women and 102 men); sample 2 comprised 85 individuals with acute spinal pain (62 women and 23 men). The dimensionality of the PASS-20-SV items was evaluated using Exploratory Factor Analysis and an optimal implementation of Parallel Analysis (robust maximum likelihood). Data from sample 1 was used to analyse internal consistency and convergent validity. Estimated test-retest stability and predictive validity were based on data from the sample 2 participants, who completed the first administration (T1) and a second administration (T2, 6 months later). Results: The PASS-20-SV comprises two factors: pain-related anxiety and apprehension, and pain-related fear and avoidance. It has good to excellent reliability and adequate test-retest stability. The results support its convergent and predictive validity. Conclusions: The Spanish Version of the PASS-20 is a valid, reliable measure of pain-related anxiety and pain-related fear in Spanish-speaking patients. (AU)

Antecedentes: el PASS-20 es una medida general de la ansiedad y el miedo relacionados con el dolor. El objetivo del presente estudio fue adaptar el cuestionario para su uso en población española. Método: la muestra 1 incluyó 216 personas con dolor crónico de espalda (114 mujeres y 102 hombres); la muestra 2 comprendió 85 personas con dolor agudo de espalda (62 mujeres y 23 hombres). La estructura factorial del PASS-20-SV se evaluó mediante un análisis factorial exploratorio y un análisis paralelo (máxima verosimilitud). Los datos de la muestra 1 se utilizaron para analizar la fiabilidad y la validez convergente. La estabilidad estimada de la prueba y la validez predictiva se basaron en los datos de los participantes de la muestra 2, que completaron el instrumento en dos momentos (T1 y T2, 6 meses después). Resultados: la versión española del PASS-20 se compone de dos factores: ansiedad y aprehensión al dolor, y miedo y evitación del dolor, con buena consistencia interna y adecuada estabilidad. Los resultados apoyan la validez convergente y predictiva del instrumento. Conclusiones: la versión española del PASS-20 es una medida válida y fiable para evaluar la ansiedad y el miedo al dolor. (AU)