NCT04028635

Treating the Fear of Gaining Weight in Anorexia Nervosa

Treating the Fear of Gaining Weight. A Randomized Controlled Clinical Trial for Patients With Anorexia Nervosa

• Status: Terminated
• Phase: N/A
• Study type: Interventional
• Enrollment: 35 (actual)
• Sponsor: University of Barcelona · Academic / Other
• Sex: All
• Age: 14 Years
• Healthy volunteers: Not accepted

Summary

The main aim of this study is to develop a virtual reality (VR) embodiment-based exposure technique to improve the treatment of anorexia nervosa (AN). A systematic and hierarchical body exposure intervention in which the patient owns a virtual avatar is proposed. At first, the virtual body matches with the real measurements of the patient, then the experimenter will progressively increase Body Mass Index (BMI) values of the virtual body during the exposure sessions until a healthy BMI value is reached (e.g. BMI score of 20). In this study a VR embodiment-based technique that combines visuo-motor and a visuo-tactile stimulation procedures is proposed in order to increase illusory feelings of ownership over the virtual body. It is hypothesised that adding a VR-based body exposure intervention to the classical cognitive behavioral therapy (CBT) will significantly reduce symptomatology in AN patients.

Detailed description

In order to evaluate the efficacy of the addition of a VR body exposure component to the usual treatment, a randomized controlled clinical trial will be conducted. 54 patients with a primary diagnosis of anorexia nervosa and a BMI \> 18.5 will be randomly assigned to the experimental group receiving VR body exposure in addition to cognitive behavioral therapy or control group, which receives cognitive behavioral therapy only. Data regarding eating disorder symptomatology and body related attention will be collected before and at the end of the intervention, as well as after six months of follow-up. In the systematic and hierarchical VR body exposure intervention, which consists of 5 weekly exposure sessions, patients will gradually be exposed to increases in the BMI of their virtual avatar. Each session starts by inducing illusory feelings of ownership over the virtual body by the means of visuo-tactile and visuo-motor stimulation. Then patients are exposed to their virtual bodies in order to achieve the habituation or extinction of the anxiety response to their body image and, consequently, reduce the fear of gaining weight. During exposure, patients will be asked to focus on different parts of the virtual body, by asking what they think and feel about them. Body ownership illusion, body-related anxiety and fear of gaining weight will be assessed within each session by means of visual analogue scales.

Conditions

• Anorexia Nervosa

Interventions

Type	Name	Description
BEHAVIORAL	Cognitive-behavioral therapy plus VR-based body exposure	Combine usual cognitive-behavioral treatment (CBT) sessions with additional five VR-based body-exposure therapy sessions.
BEHAVIORAL	Cognitive behavioral therapy	Usual CBT

Timeline

• Start date: 2019-02-25
• Primary completion: 2020-04-30
• Completion: 2020-07-30
• First posted: 2019-07-22
• Last updated: 2020-11-17

Locations

1 site across 1 country: Spain