The purpose of the current study is to examine expressed emotion (EE) and long-term treatment outcome among adolescents participating in a randomized controlled trial (RCT) for treatment of anorexia nervosa (AN). It was hypothesized that patients with high EE parents at baseline would show more severe symptoms at end-of-treatment, 12-month follow-up, and 4-year follow-up than patients from low EE families.