Effectiveness of treatment for adolescents and adults with anorexia nervosa in a routine residential setting.

Residential treatment is a necessary element of treatment in some cases of anorexia nervosa, where it is used prior to transitioning to complete the treatment in a less intensive setting. This study tests how effective residential treatment is at helping adolescent and adult patients to reduce their eating pathology to levels that can be managed in outpatient settings. Ninety-eight patients with anorexia nervosa started treatment in a routine residential setting (83 completers). The adolescent and adult groups showed comparable levels of benefit, showing gains in weight and reductions in eating pathology, compatible with transitioning to less intensive treatment. Change was particularly substantial over the first 6 weeks. This effectiveness study has shown that an appropriate period of residential treatment can be used to prepare patients to be able to benefit from a less intensive treatment, regardless of age group.