A Test of Nutritional Interventions to Enhance Weight Loss Maintenance

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01065974
Recruitment Status : Completed
First Posted : February 10, 2010
Last Update Posted : October 9, 2017
University of Pennsylvania
Information provided by (Responsible Party):
Michael Lowe, Drexel University

Brief Summary:
The purpose of this study is to compare standard Behavior Therapy (BT), BT plus Meal Replacements (MR) and a condition focusing on the nutritional changes to the home food environment (HFE) on weight loss, weight loss maintenance, nutritional composition of the diet and psychosocial outcomes. A second aim is to determine the degree to which the specific targets of the experimental interventions do in fact change in the anticipated direction during the intervention and to evaluate whether such changes might account for improvements in weight loss maintenance. This study is important because it could provide the first evidence that the current standard of care for obesity lifestyle treatment could be improved by the addition of MRs or a program of comprehensive nutritional change.

Condition or disease Intervention/treatment Phase
Overweight Obesity Weight Loss Maintenance Behavioral: Behavior Therapy Dietary Supplement: Meal Replacements Behavioral: Nutritrol Not Applicable

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 262 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Test of Nutritional Interventions to Enhance Weight Loss Maintenance
Study Start Date : October 2009
Actual Primary Completion Date : April 30, 2016
Actual Study Completion Date : April 30, 2016

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Active Comparator: Behavior Therapy

Behavioral treatment strategies will be utilized to facilitate adherence to the treatment goals in all three treatments. Participants in the BT condition will receive only the BT intervention. Strategies that will be emphasized are listed below:

  • Self monitoring
  • Stimulus control
  • Changing eating behaviors
  • Goal setting
  • Problem solving
  • Social support
  • Cognitive restructuring
  • Relapse prevention
Behavioral: Behavior Therapy
Weight loss using CBT and continued CBT during weight loss maintenance.

Experimental: Behavior Therapy + Meal Replacements
The BT +MR condition will implement behavioral treatment strategies in a way that is nearly identical to that of the BT condition. However, participants in this condition also will use MRs during weight loss and weight loss maintenance.
Dietary Supplement: Meal Replacements
Weight loss using CBT and meal replacements.

Experimental: Nutritrol

Participants in this condition will be informed about the evidence indicating that the availability, structure and composition of foods they encounter or seek out in their daily lives will play a major role in determining their ability to maintain the weight they lose. We will present the treatment as an opportunity to make numerous changes to their "personal food environment" involving the variety, energy density, nutritional composition, and portion size of the foods they encounter in every day life.

The Nutritrol condition is comprised of several components:

  • Food structure
  • Energy density
  • Reduce variety of foods high in energy density and increase variety of foods low in energy density
  • Protein intake
  • Controlling the personal food environment
  • Individualized weight loss maintenance prescriptions
Behavioral: Nutritrol
To make widespread nutritional changes to participants personal food environments.

Primary Outcome Measures :
  1. Change in Body weight over time. [ Time Frame: Baseline, 6 months, 12 months, 18 months, 24 months, 36 months ]
    Change in body weight measured on electronic scale.

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Male and female participants between the ages of 18 and 65
  • body mass index (BMI; kg/m2) between 27-45
  • able to travel regularly to the study location
  • interested in participating in a weight loss program.

Exclusion Criteria:

  • currently enrolled in another organized weight loss program
  • lactose intolerance
  • taking medications that affect appetite (unless dosage had been stable for at least the previous six months)
  • history of gastric bypass or other surgical weight loss procedures
  • medical conditions (e.g., cancer, substance abuse, psychotic disorders) that could limit their ability to comply with the behavioral recommendations or pose a risk to the participant during weight loss
  • pregnancy or planning to become pregnant during the next two years -
  • breastfeeding
  • consuming an amount of alcohol that could interfere with study completion

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01065974

United States, Pennsylvania
Drexel University
Philadelphia, Pennsylvania, United States, 19102
University of Pennsylvania
Philadelphia, Pennsylvania, United States, 19104
Sponsors and Collaborators
Drexel University
University of Pennsylvania
Principal Investigator: Michael R Lowe, Ph.D. Drexel University

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Michael Lowe, Professor, Drexel University Identifier: NCT01065974     History of Changes
Other Study ID Numbers: 5R01DK80909-2
First Posted: February 10, 2010    Key Record Dates
Last Update Posted: October 9, 2017
Last Verified: October 2017

Keywords provided by Michael Lowe, Drexel University:
Nutritional Intake
Psychosocial Outcome

Additional relevant MeSH terms:
Body Weight
Weight Loss
Signs and Symptoms
Body Weight Changes