title: Purging disorder: subthreshold variant or full-threshold eating disorder?
abstract: OBJECTIVE
  To review evidence of the clinical significance, distinctiveness, and prevalence of a newly characterized form of eating disorder not otherwise specified, purging disorder (PD).
  
  
  METHODS
  Articles were identified by computerized and manual searches.
  
  
  RESULTS
  PD is a clinically significant disorder of eating that does not appear to differ meaningfully in severity from bulimia nervosa (BN). Preliminary evidence supports the distinctiveness of PD from BN, but no studies have directly examined PD in comparison with anorexia nervosa (AN). Epidemiological studies indicate that PD affects between 1.1 and 5.3% of young adult women in their lifetimes, reflecting lifetime prevalence rates comparable with those for AN and BN.
  
  
  CONCLUSIONS
  More research on PD is needed, particularly with regard to etiology, treatment, course, and outcome. Such work would be greatly facilitated by standardization of the syndrome's definition.
authors.affiliation: Department of Psychology, The University of Iowa, Iowa City 52242, USA. pamela-keel@uiowa.edu
authors.forename: Pamela K
authors.initials: PK
authors.lastname: Keel
mesh_terms: D052018:Bulimia Nervosa / Q000175:diagnosis; D003937:Diagnosis, Differential; D001068:Feeding and Eating Disorders / Q000145:classification* / Q000175:diagnosis / Q000453:epidemiology; D006801:Humans; D015995:Prevalence; D009626:Terminology as Topic