Anorexia Nervosa

• Body weight < 85% of expected weight
• Intense fear of gaining weight
• Undue emphasis on body shape or weight
• Amenorrhea (in girls and in women after menarche) for three consecutive months
  

Bulimia Nervosa

• Recurrent binge eating (at least two times per week for three
  months duration)
  
• Recurrent, inappropriate, compulsive behavior to prevent
  weight gain such as self-induced vomiting, abuse of laxatives,
  diuretics or other medications, or excessive exercise
  
• Persistent overconcern with body shape and/or weight
  
• Absence of anorexia nervosa

Binge Eating Disorder

• Recurrent episodes of binge eating. An episode is
  characterized by:
  1. Eating a larger amount of food than normal during a short
  period of time (within any two hour period).
  2. Lack of control over eating during the binge episode (i.e.,
  the feeling that one cannot stop eating).
• Binge eating episodes are associated with three or more
  of the following:
  1. Eating until feeling uncomfortably full.
  2. Eating large amounts of food when not physically hungry.
  3. Eating much more rapidly than normal.
  4. Eating alone because you are embarrassed by how much you are eating.
  5. Feeling disgusted, depressed, or guilty after overeating.
  
• Marked distress regarding binge eating is present
  
• Binge eating occurs, on average, at least two days a week for six months
  
• The binge eating is not associated with the regular use of inappropriate compensatory behavior (i.e. purging, excessive exercise, etc.) and does not occur exclusively during the course of bulimia nervosa or anorexia nervosa.

Adapted from American Psychiatric Association. Eating Disorders. In: Diagnostic and Statistical Manual of Mental Disorders, (DSM-IVTR), fourth edition, Washington, DC: American Psychiatric Association, 2000, p.583-97.