Hypnosis and States of Change to Promote Weight Loss

Study Overview
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Brief Summary
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Complementary and alternative therapies for weight loss treatment may be effective. There are few studies showing promise of the use of hypnosis in weight-reduction programs; however, there are lots of bias and more rigorous rials are needed to establish the relationship between hypnosis and weight management. Furthermore, the effect of hypnosis may not be directly related to weight loss but rather on behavioral change. On the basis of the trans theoretical model of change, we hypothesized that audio taped hypnosis would facilitate greater movement through the stages of change toward weight loss as compared to general advice. OBJECTIVE: The primary aim of this study is to assess the ability of audio taped hypnosis to promote weight loss through its effect on the stages and the processes of change as defined by the Trans theoretical Model of change. DESIGN: Randomized controlled trial. SETTING: American University of Beirut Medical Center. PARTICIPANTS: Adults with overweight and obesity will be recruited if they had previous attempt to lose weight, are planning to lose weight within the next 6 months or are not satisfied with the results of their current weight loss plan. INTERVENTIONS: This research will be triple blinded randomized placebo controlled trial. The intervention group will be listening to a hypnotic audio-file on a USB and the control group will be listening to a placebo audio-file on a USB . The hypnotic audio-file will consist of a 20 minutes recording prepared by an experienced hypnotist and the control audio-file will consist of a 20 minutes recording with direct messages targeting lifestyle modification. Follow up visits will take place at 21 days, 3 months, 6 months and 12 months following the intervention to assess for any change in participant's readiness to lose weight. MAIN OUTCOME MEASURES: The primary outcome will be the difference between the groups in acquiring at least one stage change (upward) as defined by the S-weight from baseline to 3 weeks, 6 months and 12 months post intervention. The secondary outcomes include difference in the mean score of any item of the processes of change between hypnosis audio-file and control audio-file, weight in kg at 3 weeks, 6 and 12 months as compared to baseline weight, decrease in waist circumference in cm as compared to baseline at 6 and 12 months between the hypnosis and control groups, exploring factors that may affect any of the primary and secondary outcomes such as gender, age, educational status, baseline BMI, PHQ2.

Official Title
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The Use of Audiotaped Hypnosis in Promoting Weight Loss Using the Transtheoretical Model of Change

Conditions
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Obesity, Weight Loss

Intervention / Treatment
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* Other: Listening to an audiotape


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: BMI 25 kg/m2 and above, aged 18 to 64 years, able to give written informed consent, fluent in English, all men and women not planning on getting pregnant within the next 12 months, with previous attempts to lose weight, planning to lose weight within the next 6 months or not satisfied with the results of their current weight loss plan. Exclusion Criteria: individuals diagnosed with a psychotic disorder, currently on an antipsychotic medication, pregnant women, women planning on getting pregnant during the study period, not planning on losing weight within the next 6 months, not meeting the inclusion criteria or those who are satisfied with their weight loss progress, and illiterate.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 64 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Hypnosis<br> | Other: Listening to an audiotape<br>* The participants listen to a audiofile that consists of hypnosis<br>|
| Placebo Comparator: Control<br> | Other: Listening to an audiotape<br>* The participants listen to a audiofile that consists of hypnosis<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Acquiring at least one stage change (upward) as defined by the S-weight | the difference between the groups in acquiring at least one stage change (upward) as defined by the S-weight from baseline to 3 weeks, 6 months and 12 months post intervention. | 21 days, 3 months, 6 months and 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Weight change | difference in the weight between hypnosis audio-file and control audio-file, at 3 weeks, 6 and 12 months as compared to baseline weight | 21 days, 3 months, 6 months and 12 months | 
| difference in the mean score of any item of the processes of change | difference in the mean score of any item of the processes of change between hypnosis audio-file and control audio-file, weight in kg at 3 weeks, 6 and 12 months as compared to baseline | 21 days, 3 months, 6 months and 12 months | 
| Change in waist circumference in cm as compared to baseline | decrease in waist circumference in cm as compared to baseline | 6 and 12 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Weight loss, Hypnosis, Adults, Behavior change