Evaluation of the Brazilian version of Patient Health Questionnaire (PHQ-9) in Quilombola population using the Item Response Theory
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Resumen
Objetivo. Este estudio investiga las propiedades psicométricas de la PHQ-9 usando la Teoría de Respuesta de Ítem.
Método. Utilizamos el modelo de respuesta gradual para evaluar la depresión en 764 residentes en comunidades rurales brasileñas descendientes de esclavos (quilombos) del condado de Vitória da Conquista, estado de Bahía, Brasil, que habían respondido al PHQ-9. Estimamos los parámetros para la discriminación y la dificultad del ítem.
Resultados. Los ítems del PHQ-9 mostraron la capacidad de discriminar de moderado a muy alto. Los ítems que evaluaban los pensamientos de hacerse daño a sí mismo y la muerte mostraban la mayor discriminación, mientras que sentirse deprimido mostró la discriminación más baja.
Discusión y conclusión. La Teoría de Respuesta de Item permite avances en el análisis de las propiedades psicométricas de las herramientas de evalúan la depresión y permitió concluir que el PHQ-9 puede utilizarse en poblaciones rurales de Brasil.
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