Bulimia nervosa: group behavior therapy with exposure plus response prevention

Area of Science:

• Clinical Psychology
• Behavioral Therapy
• Eating Disorder Treatment

Background:

• Individual exposure plus response prevention (ERP) is effective for bulimia nervosa but is labor-intensive and costly.
• A need exists for more cost-effective treatment modalities for this eating disorder.

Purpose of the Study:

• To evaluate the efficacy of exposure plus response prevention delivered within a 6-week, 12-session behavioral group format for bulimia nervosa.
• To assess the cost-effectiveness of group ERP compared to individual therapy.

Main Methods:

• Eight women with diagnosed bulimia nervosa participated in a group therapy program incorporating ERP, self-monitoring, cognitive restructuring, eating-habit stabilization, and problem-solving.
• Participants reported binge-purge frequency, and depression and binge-eating scores were measured using the Beck Depression Inventory and Binge Eating Scale, respectively.

Main Results:

• All but one participant showed significant reductions in bingeing and vomiting behaviors post-treatment.
• Depression and binge-eating scores significantly decreased after the group intervention.
• At 6 months and 1 year post-treatment, 75% of participants maintained reduced binge-purge frequency, while a wait-list control group showed no change.

Conclusions:

• Exposure plus response prevention in a behavioral group context is a viable and cost-effective alternative to individual treatment for bulimia nervosa.
• Group ERP demonstrates sustained efficacy in reducing core symptoms of bulimia nervosa and improving psychological well-being.