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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.

Secondary analyses were conducted with data from an epidemiological study of women (n = 1,640) and men (n = 794). Three definitions of significant weight loss (5, 10, and 15%) for AAN were tested in comparisons with controls and a DSM‐5 eating disorder group (DSM‐5 ED) on measures of eating pathology and clinical significance using ANCOVA and logistic regression, controlling for age and body mass index. Secondary analyses compared AAN to a weight suppressed group (WS‐only) and a cognitive concerns group …