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Changes in Food Reinforcement During Obesity Treatment

This study has been completed.
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Information provided by (Responsible Party):
The Miriam Hospital Identifier:
First received: September 12, 2005
Last updated: April 19, 2012
Last verified: December 2007
The reinforcing value of food, or how much a person "wants" a food, is an important determinant of food intake. Thus far, food reinforcement has only been studied in laboratory settings, and no studies have examined whether the reinforcing value of food is altered when dietary changes are made. The chronic deprivation that occurs when a low-calorie, low-fat diet is implemented for weight loss may increase the reinforcing value of all foods, but particularly for restricted high-fat foods. Greater increases in the reinforcing value of high-fat foods relative to low-fat foods may be detrimental for sustaining newly adopted eating behaviors that produce weight loss, whereas greater increases in the reinforcing value of low-fat foods relative to high-fat foods may aid in maintaining healthy eating behaviors. The aim of this application is to measure food reinforcement in a clinical setting to determine if food reinforcement changes when a traditional weight loss diet is prescribed. For this ancillary study, 147 volunteers will be recruited from the 165 overweight and obese women participating in the Program to Reduce Incontinence by Diet and Exercise (PRIDE) at The Miriam Hospital. As part of PRIDE, these participants will be randomized in a 2-to-1 ratio to either a 6-month weight loss intervention or usual care. Assessments of food reinforcement, dietary intake, and weight will occur at 0 and 6 months. Given that the intervention group changes their diet relative to the usual care group, it is hypothesized: 1) the intervention group will have greater increases in the reinforcing value of both high- and low-fat foods than the usual care group from 0 to 6 months; and 2) within the intervention group, decreases in frequency of consumption of high-fat foods will be related to increases in the reinforcing value of high-fat foods from 0 to 6 months. These results will lead to a novel line of research, examining the relationship between food reinforcement and weight loss maintenance, so that diets can be designed to promote changes in food reinforcement that aid in sustaining dietary changes and weight loss.

Condition Intervention
Behavioral: hypocaloric, low-fat diet

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Diagnostic
Official Title: Changes in Food Reinforcement During Obesity Treatment

Further study details as provided by The Miriam Hospital:

Primary Outcome Measures:
  • Reinforcing value of low- and high-fat food [ Time Frame: 6 months ]

Secondary Outcome Measures:
  • diet changes and weight loss [ Time Frame: 6 months ]

Estimated Enrollment: 147
Study Start Date: July 2004
Study Completion Date: October 2007
Primary Completion Date: October 2007 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
Behavioral: hypocaloric low-fat diet
Behavioral: hypocaloric, low-fat diet
hypocaloric, low-fat diet
Placebo Comparator: 2
Behavioral: hypocaloric, low-fat diet
Behavioral: hypocaloric, low-fat diet
hypocaloric, low-fat diet


Ages Eligible for Study:   21 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Participants from main parent study - PRIDE

Exclusion Criteria:

  • Allergic to foods in investigation
  Contacts and Locations
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Please refer to this study by its identifier: NCT00200291

United States, Rhode Island
The Weight Control and Diabetes Research Center
Providence, Rhode Island, United States, 02903
Sponsors and Collaborators
The Miriam Hospital
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Principal Investigator: Hollie A Raynor, PhD University of Tennessee
  More Information

Responsible Party: The Miriam Hospital Identifier: NCT00200291     History of Changes
Other Study ID Numbers: 3U01DK067861-02S1 ( US NIH Grant/Contract Award Number )
Study First Received: September 12, 2005
Last Updated: April 19, 2012

Additional relevant MeSH terms:
Nutrition Disorders
Body Weight
Signs and Symptoms processed this record on May 25, 2017