An examination of the factor structure of the eating disorder examination questionnaire

The purpose of this research was to evaluate the factor structure of the Eating Disorder Examination Questionnaire (EDE-Q). Currently there is a four subscale approach to interpreting results; however, recent findings have indicated varying factor structures, including 1 and 3 factor solutions. This study utilised a large epidemiological sample (N=5255) of Australian women (Mean age = 30.26, SD=7.22). The sample was randomly divided to supply a test, and replication sample. Current factor models were tested using sequential confirmatory factor analysis. The models were tested using mean and variance adjusted weighted least squares (WLSMV) estimations of the tetrachoric correlation matrix. Support was found for a three factor model, comprised of a combined weight and shape factor, a restraint factor, and an eating concern factor. Adjustments were made to refine the supported model. Four items were found to be replicating another similar item, and therefore were removed. Additionally the question assessing fasting, \Avoidance of eating\" was problematic concurring with previous research. The findings of this study support a reduced three subscale structure for the EDE-Q in which the division between weight and shape is removed. Further examination of the methodological problems associated with contagion and question order effects may aid in future research. In considering these findings and those of other researchers there is limited support for the stability of the subscales across different samples and this should be considered in interpreting research utilising the EDE-Q."