Defining "significant weight loss" in atypical anorexia nervosa.

Objective: Atypical anorexia nervosa (AAN) is defined by the symptoms of anorexia nervosa in the presence of "significant weight loss" in individuals who are not underweight. Description of current weight in AAN has been limited, significant weight loss has not been defined, and the distinction between having AAN versus having weight suppression has not been examined.

Method: Secondary analyses were conducted with data from an epidemiological study of women (n = 1,640) and men (n = 794).