Akershus University Hospital Retrospective Cohort Study of Family Based Treatment

The goal of this observational study is to compare short and long-term effects of manualised Family Based Treatment for adolescent anorexia nervosa to those of non-manualised family therapy. The study will approach former patients who were treated before and after Family Based Therapy was adopted in an outpatient clinic, and extract data from electronic health records and public registries.

Inclusion Criteria:• Clinical diagnosis of F50.0 Anorexia nervosa or F50.1 Atypical anorexia nervosa according to the International Classification of Diseases-10.Exclusion Criteria:• Patient was treated during the years 2018-2020 and FBT was never initiated according to patient health records.