Effectiveness Trial of Temperament Based Therapy With Support (TBT-S)

Participants in the intervention arm will receive five days of TBT-S in addition to treatment as usual. TBT-S is administered to three to six adult anorexia nervosa patients with up to four supports per patient. The treatment structure consists of five consecutive days of treatment, up to 7,5 hours each day. Staff requirements for TBT-S are three clinicians, one dietician and one medical staff. Adults referred to a local psychiatric centre (DPS) for out-patient anorexia nervosa treatment, and their supports, will be eligible to participate in the study.

Inclusion criteria

• Age ≥18, all genders
• A Diagnostic and Statistical Manual of Mental Disorders (DSM-5) diagnosed anorexia nervosa disorder (F50.0, F50.01, F50.02, also including F50.9 - atypical anorexia nervosa)
• Willingness to have Support(s) participate in treatment
• Medically stable

Exclusion criteria

• Intellectual developmental disorder or intellectual disability; psychotic disorder or other psychopathology that may affect or prevent participation in the study
• diagnosed alcohol or other substance use disorder within 3 months prior to study initiation
• ongoing inpatient treatment at the time of study enrollment (participants currently in inpatient care must be discharged and engaged in outpatient treatment before participating in the TBT-S week