ACTyourCHANGE Study Protocol. Promoting Healthy Lifestyle With ACT for Obesity

Summary

Background: as treatment of choice in promoting psychological flexibility, Acceptance and Commitment Therapy (ACT) was found to be effective in several conditions, and among different populations, including weight management in individuals with obesity. However, the mechanism of action of psychological flexibility is less known. The aim of the present study is, within the context of a brief ACT intervention for behavioral change and behavioral maintenance of a healthy lifestyle in a sample of inpatients with obesity, to explore the effect of each subcomponent of the psychological flexibility model on treatment processes and outcomes.

Methods: a randomized controlled trial will be conducted. 90 Italian adult inpatients with obesity attending a rehabilitation program for weight loss will be randomly allocated into three experimental conditions targeting respectively each subcomponent of the psychological flexibility model: group Engage focused on values-oriented behaviors, group Openness focused on acceptance and cognitive defusion, and group Awareness focused on being present and aware of thought, feelings, and behaviors at every moment. Weight, BMI (Kg/m2), the Psychological General Well Being Inventory (PGWBI), the Outcome Questionnaire-45.2 (OQ-45.2), the Depression Anxiety and Stress Scale (DASS-21), the Difficulties in Emotion regulation scale (DERS) the Dutch eating Behaviors Questionnaire (DEBQ), the Brief Values Inventory (BVI), the Committed Action Questionnaire (CAQ), the Italian-Cognitive Fusion Questionnaire (I-CFQ), and the Five Facet Mindfulness Questionnaire (FFMQ) and the Acceptance and Action Questionnaire (AAQ II) will be assessed at the beginning (Time 0), at the end of psychological intervention (Time 1), after 3 (Time 2) and 6 months (Time 3) and 9 months (Time 4) from discharge. During the following month after discharge, outpatients will be monitored in their adherence to a healthy lifestyle, using a wearable device.

To assess the effectiveness of intervention, mixed between-withing 3 (conditions) x 4 (times) repeated measure ANOVAs will be conducted to examine changes from time 0 to time 1, 2, 3 and 4 in means of weight, BMI, and means scores PGWBI, OQ-45.2, DASS; DERS; DEBQ, AAQ-II, BVI, CAQ, I-CFQ, and FFMQ, between three groups Discussion: This study will contribute to clarify the mechanism of action of each subcomponent of the psychological flexibility model and understand its impact on the promotion of a healthy lifestyle.

Conditions

• Health Behavior

Interventions

BEHAVIORAL

FACT Module Engagement

Focused- Acceptance and Commitment Therapy. Third-wave Cognitive Behavioral Therapy (Psychological intervention)

BEHAVIORAL

FACT Module Openness

Focused- Acceptance and Commitment Therapy. Third-wave Cognitive Behavioral Therapy (Psychological intervention)

BEHAVIORAL

FACT Module Awareness

Focused- Acceptance and Commitment Therapy. Third-wave Cognitive Behavioral Therapy (Psychological intervention)

Sponsors & Collaborators

• Istituto Auxologico Italiano

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

65 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2021-02-01

Primary Completion

2024-03-31

Completion

2024-09-30

Countries

• Italy

Study Locations