Estructura factorial de la versión española de la Escala de Depresión Postnatal de Edimburgo

espanolIntroduccion. La Escala de Depresion Postnatal de Edimburgo (EPDS) es considerada el gold standard para el cribado de depresion postparto. Aunque la version espanola ha sido ampliamente utilizada, su estructura factorial no ha sido todavia analizada. Metodologia. Un total de 1.204 mujeres completaron la EPDS a las 32 semanas del parto. Para evitar pruebas multiples dividimos la muestra en dos mitades de 602 participantes. Se realizo un analisis factorial exploratorio (AFE) con rotacion oblimin con la primera sub-muestra. Posteriormente, con la segunda de las muestras se realizo un analisis factorial confirmatorio (AFC) mediante la estimacion Weighted Least Squares Means and Variance (WLSMV). Se exploraron diferentes soluciones entre dos y cuatro factores. Comparamos los factores en dos grupos de participantes con depresion y sin depresion (evaluados con la Entrevista Diagnostica para Estudios Geneticos (DIGS) para el DSM-IV). Resultados. El AFE mostro un modelo de tres factores compuesto por ansiedad, depresion y anhedonia. Los resultados del AFC confirmaron el modelo de tres factores (χ2=99,203, p Conclusiones. Primer estudio de analisis confirmatorio de la version espanola de la EPDS, en una amplia muestra de mujeres sin tratamiento psiquiatrico durante el embarazo. Un modelo de tres factores compuesto por ansiedad, depresion y anhedonia ha sido obtenido. Mujeres con depresion tuvieron una mayor puntuacion en las tres dimensiones de la EPDS. EnglishIntroduction. The Edinburgh Postnatal Depression Scale (EPDS) is considered the gold standard in screening for post-partum depression. Although the Spanish version has been widely used, its factorial structure has not yet been studied. Methods. A total of 1,204 women completed the EPDS 32 weeks after delivery. To avoid multiple testing, we split the sample into two halves, randomly drawing two subsamples of 602 participants each. We conducted exploratory factor analysis (EFA), followed by an oblimin rotation with the first sub-sample. Confirmatory factor analysis (CFA) was conducted using a Weighted Least Squares Means and Variance (WLSMV) estimation of the data. We explored different solutions between two and four factors. We compared the factors between two groups with depression and non-depression (evaluated with the Diagnostic Interview for Genetic Studies (DIGS) for the DSM-IV). Results. The EFA indicated a three-factor model consisting of anxiety, depression and anhedonia. The results of the CFA confirmed the three-factor model (χ2=99.203, p Conclusions. This is the first study of confirmatory analysis with the Spanish version of EPDS in a large sample of women without psychiatric care during pregnancy. A three-factor model consisting of anxiety, depression and anhedonia was used. Women with depression had a higher score in the three dimensions of the EPDS.