A more rational, theory-driven approach to analysing the factor structure of the Edinburgh Postnatal Depression Scale

Kozinszky, Zoltán and Töreki, Annamária and Hompoth, Emőke Adrienn and Dudás, Róbert B. and Németh, Gábor László (2017) A more rational, theory-driven approach to analysing the factor structure of the Edinburgh Postnatal Depression Scale. PSYCHIATRY RESEARCH, 250. pp. 234-243. ISSN 0165-1781

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Abstract

Abstract We endeavoured to analyze the factor structure of the Edinburgh Postnatal Depression Scale (EPDS) during a screening programme in Hungary, using exploratory (EFA) and confirmatory factor analysis (CFA), testing both previously published models and newly developed theory-driven ones, after a critical analysis of the literature. Between April 2011 and January 2015, a sample of 2967 pregnant women (between 12th and 30th weeks of gestation) and 714 women 6 weeks after delivery completed the Hungarian version of the EPDS in South-East Hungary. EFAs suggested unidimensionality in both samples. 33 out of 42 previously published models showed good and 6 acceptable fit with our antepartum data in CFAs, whilst 10 of them showed good and 28 acceptable fit in our postpartum sample. Using multiple fit indices, our theory-driven anhedonia (items 1,2) – anxiety (items 4,5) – low mood (items 8,9) model provided the best fit in the antepartum sample. In the postpartum sample, our theory-driven models were again among the best performing models, including an anhedonia and an anxiety factor together with either a low mood or a suicidal risk factor (items 3,6,10). The EPDS showed moderate within- and between-culture invariability, although this would also need to be re-examined with a theory-driven approach.

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