How does body weight and symptom duration affect the prognosis of anorexia nervosa?

Updated: Jun 10, 2019
  • Author: Bettina E Bernstein, DO; Chief Editor: Caroly Pataki, MD  more...
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Although the degree of weight loss at the clinically noted onset of the involvement of the patient's organic systems is not predictive of outcome, lower weight (less than 75% of mean body weight [MBW]) and longer duration (more than 19 months) of symptoms were predictors of poorer outcomes in a review of 267 adolescents from 11 different eating disorder programs. [65]

A shorter duration of involvement of the patient's organic systems before admission and a short inpatient treatment period have been associated with a favorable outcome in some studies.

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