Predictors of Intensive Enhanced Cognitive Behavioral Therapy for Anorexia Nervosa. Prospective Cohort Study

Area of Science:

• Psychiatry
• Clinical Psychology
• Eating Disorders Research

Background:

• Anorexia nervosa (AN) is a severe eating disorder with complex treatment needs.
• Enhanced cognitive behavioral therapy (CBT-E) is an intensive treatment approach for AN.
• Identifying predictors of treatment response is crucial for optimizing patient outcomes.

Purpose of the Study:

• To identify baseline predictors of treatment response in AN patients undergoing intensive CBT-E.
• To examine demographic, clinical, and psychosocial variables associated with outcomes.
• To assess treatment outcomes at the end of intensive treatment (EOIT) and 20-week follow-up.

Main Methods:

• A prospective cohort study of 421 AN patients (aged 16-63) receiving intensive CBT-E.
• Baseline assessments included body mass index (BMI), eating disorder psychopathology (EDE-Q), general psychopathology, and functional impairment.
• Intent-to-treat analysis was used to evaluate outcomes.

Main Results:

• High treatment completion (82.7%) and follow-up rates (70.6%).
• Significant proportions achieved good BMI outcome (83.2% at EOIT, 58.7% at follow-up) and full response/recovery (63.3% at EOIT, 51.5% at follow-up).
• Higher baseline BMI predicted good BMI outcomes; lower baseline EDE-Q scores predicted full response at EOIT. At follow-up, higher BMI, lower EDE-Q, and greater changes in BMI and EDE-Q during treatment predicted full response.

Conclusions:

• Baseline body mass index (BMI) and eating disorder psychopathology (EDE-Q) are significant predictors of treatment outcomes in AN patients receiving intensive CBT-E.
• Early weight gain and reduction in eating disorder psychopathology are critical treatment targets.
• These findings highlight the importance of focusing on these factors to enhance treatment success in AN.