Core pathology of eating disorders as measured by the Eating Disorder Examination Questionnaire (EDE-Q): the predictive role of a nested general (g) and primary factors
Version of Record online: 19 AUG 2013
Copyright © 2013 John Wiley & Sons, Ltd.
International Journal of Methods in Psychiatric Research
Volume 22, Issue 3, pages 195–203, September 2013
How to Cite
Friborg, O., Reas, D. L., Rosenvinge, J. H. and Rø, Ø. (2013), Core pathology of eating disorders as measured by the Eating Disorder Examination Questionnaire (EDE-Q): the predictive role of a nested general (g) and primary factors. Int. J. Methods Psychiatr. Res., 22: 195–203. doi: 10.1002/mpr.1389
- Issue online: 18 SEP 2013
- Version of Record online: 19 AUG 2013
- eating disorders;
- factor analysis;
- ‘g’ and specific latent factors;
- Eating Disorder Examination Questionnaire
The present study examined several factor models of the Eating Disorder Examination Questionnaire (EDE-Q), and in particular, whether a nested general factor (‘g’) was present, hence supporting a common pathology factor. A total of 1094 women were randomly selected by Statistics Norway and mailed a questionnaire packet. The sample was randomly split, using the first half for exploratory analyses and the second for confirmatory validation purposes. A four-factor solution received the best support, but the structure deviated from the original model of Fairburn. The internal consistency was high for the first three factors (.93, .82 and .86) and satisfactory for the fourth (.78). The additional specification of a general (g) factor improved model fit significantly, implying that the EDE-Q scores are indicators of both a general core and four primary symptom patterns. Furthermore, the g was more strongly related to predictors like age and body mass index (BMI) than the four primary factors in a full structural equation model. The validity of interpreting the global EDE-Q score as indicative of g was supported. A brief Shape and Weight Concern subscale of 11 items was strongly related to the g-factor, and may provide an abbreviated measure of overall eating disorder pathology. Copyright © 2013 John Wiley & Sons, Ltd.