title: A critical examination of the amenorrhea and weight criteria for diagnosing anorexia nervosa.
abstract: BACKGROUND
  Amenorrhea and weight loss to below 15% of 'healthy' weight are current diagnostic criteria for anorexia nervosa (AN). This study compares females who meet current International Statistical Classification of Diseases and Related Health Problems, tenth revision (ICD-10) and Diagnostic and Statistical Manual of Mental Disorders, fourth edition (DSM-IV) criteria for AN with females who meet the essential psychopathology and significant self-starvation, but lack either amenorrhea or weight loss below 85%.
  
  
  METHODS
  This study retrospectively examined the medical charts of 588 consecutive admissions to an in-patient treatment program. All diagnoses conformed to ICD-10 and DSM-IV.
  
  
  RESULTS
  Of 588 admissions, 297 females had some form of AN with 77.4% (230 of 297) meeting current criteria, while 22.6% (67 of 297) with core psychopathology and self-starvation were classified as eating disorders not otherwise specified or 'atypical' because of some menstrual function or final weight above 85%. The groups showed few statistically significant differences on demographics, illness history, and treatment response, psychopathology, or bone density.
  
  
  CONCLUSIONS
  Amenorrhea may not be a useful diagnostic criterion. Also, requiring below 85% of healthy weight may need generalization.
authors.affiliation: Department of Psychiatry, The University of Iowa Hospital and Clinics, Iowa City, IA 52242-1057, USA.
authors.forename: T L
authors.initials: TL
authors.lastname: Watson
authors.forename: A E
authors.initials: AE
authors.lastname: Andersen
mesh_terms: D000328:Adult; D000568:Amenorrhea / Q000523:psychology*; D000856:Anorexia Nervosa / Q000145:classification / Q000175:diagnosis* / Q000523:psychology*; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006801:Humans; D007297:Inpatients; D038801:International Classification of Diseases; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D012189:Retrospective Studies; D018709:Statistics, Nonparametric; D016896:Treatment Outcome; D015431:Weight Loss / Q000502:physiology*