Objective: CBT-T is a relatively new, brief cognitive behavioral therapy eating disorder treatment for non-underweight patients. This study evaluates CBT-T independently from the team that developed the protocol, and examines the relationship between eating disorder duration and CBT-T effectiveness.
Method: A case series design was used, comprising N = 40 adults with bulimia or atypical anorexia type eating disorders. CBT-T was delivered by CBT therapists in a specialist outpatient service. Mixed model analysis examined the interactions between eating disorder duration and change to eating disorder psychopathology and secondary impairment from pre-post treatment. Abstinence, good outcome, and remission rates were also provided.
Results: Intervention effect sizes were large. Treatment completers reported abstinence from binge eating and purging over the final 28-days, and 7-days of treatment at 30.1%, and 73.1%, respectively; 76.9% reported good outcome; and 23.1% reported remission. No relationship between eating disorder duration and treatment effectiveness was found.
Discussion: These findings build on existing evidence supporting provision of CBT-T in routine clinical practice, for patients with eating disorders of any duration. Replication, extension, and RCT will strengthen comparability with other evidence-based approaches.
Keywords: United Kingdom; adult; anorexia nervosa; bulimia nervosa; cognitive behavioral therapy; duration; feeding and eating disorders; severe and enduring; treatment outcome.
© 2021 Wiley Periodicals LLC.