Questionnaire for eating disorder diagnoses: Reliability and validity of operationalizing DSM-IV criteria into a self-report format

The Questionnaire for Eating Disorder Diagnoses (Q-EDD) operationalizes eating disorder criteria of the 4th edition of the Diagnostic and Statistical Manual of Mental Disorders and differentiates (a) between those with and without an eating disorder diagnosis, (b) among eating-disordered, symptomatic, and asymptomatic individuals, and (c) between those with anorexia and bulimia diagnoses. Three studies examined the Q-EDD's psychometric properties. Convergent validity was supported by correspondence between Q-EDD diagnoses and established inventory scores. Criterion validity was supported by high correspondence between Q-EDD and interview or clinician diagnoses. Incremental validity was supported by greater accuracy of Q-EDD diagnoses than those yielded by an established inventory. Test-retest reliability and interscorer agreement were very good. Future use is discussed.