Predictive Validity of Purging Disorder: A 10‐Year Follow‐Up Study Comparing Prevalence and Psychosocial Outcomes for Alternative Criteria Sets

Together, findings support defining PD through self-induced vomiting, laxative use, or diuretic use to influence body shape or weight, on average, at least once per week. Specifying diagnostic criteria for PD that demonstrate evidence of concurrent and predictive validity will contribute to improved diagnostic reliability, screening, assessment, and support future research efforts to improve treatment.