title: Anorexia nervosa. No evidence of an increase.
abstract: BACKGROUND
  This paper examines the evidence that rates of anorexia nervosa have increased over time.
  
  
  METHODS
  Epidemiological studies that have provided time trends in incidence rates in specific countries or psychiatric registers and prevalence surveys were reviewed to assess whether or not prevalence estimates are higher in the most recent studies.
  
  
  RESULTS
  Estimated trends in incidence rates showed an increase but no study ruled out plausible alternative explanations. Studies showing no upward trend were as numerous and were generally based on larger samples. Analysis of 29 cross-sectional surveys conducted over the last 25 years indicated that the median prevalence rate was 1.3 per 1000 females. There was no indication that more recent surveys yielded higher prevalence rates.
  
  
  CONCLUSIONS
  Anorexia nervosa remains a rare disorder and there is no evidence of a secular increase in its incidence.
authors.affiliation: Institute of Psychiatry, London.
authors.forename: E
authors.initials: E
authors.lastname: Fombonne
mesh_terms: D000293:Adolescent; D000328:Adult; D000856:Anorexia Nervosa / Q000175:diagnosis / Q000453:epidemiology* / Q000534:rehabilitation; D003430:Cross-Sectional Studies; D005260:Female; D014943:Global Health; D006753:Hospital Records; D006760:Hospitalization; D006801:Humans; D015994:Incidence; D010343:Patient Admission; D015995:Prevalence; D011569:Psychiatric Status Rating Scales