Confirmatory factor analysis and measurement invariance of the Eating Disorder Examination Questionnaire (EDE-Q) in a non-clinical sample of non-Hispanic White and Hispanic women

Objective: Body dissatisfaction and eating disorder rates have increased in racial and ethnic minority groups, yet the validity of various commonly-used eating disorder instruments has not been established in these populations. One way to establish validity is to test for measurement invariance; namely, that the same constructs are being measured across groups. This study tested the measurement invariance of the Eating Disorder Examination Questionnaire (EDE-Q) across non-Hispanic White and Hispanic women. Method: Female undergraduates (n = 561) were recruited from a southwestern U.S. university. Confirmatory factor analysis (CFA) and measurement invariance of the EDE-Q were tested in non-Hispanic White and Hispanic samples. Results: CFA analyses revealed that the original four-factor structure did not fit the data in either group. Only a modified 7-item, three-factor structure of the EDE-Q provided an acceptable fit in both non-Hispanic White and Hispanic women. Thus, this modified EDE-Q factor structure was used to test the equivalence of the measure between groups. Results found that the factor structure was similar across groups, but the factor loadings and intercepts differed across non-Hispanic White and Hispanic women. Discussion: A modified 7-item, three-factor structure of the EDE-Q provided an acceptable fit of the data, which is supported by previous research. However, the lack of measurement invariance suggests that researchers should be cautious when using this modified EDE-Q to make explicit comparisons between non-Hispanic White and Hispanic women. Future research should further examine the psychometric properties of the EDE-Q in ethnically diverse groups, specifically the role of dietary restraint among Hispanic women.