Effect of Portion-control Training on Food Intake
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Penn State University
- Enrollment
- 105
- Locations
- 1
- Primary Endpoint
- Difference in intake by weight across subject groups
Study Overview
Brief Summary
The purpose of this study is to test whether food intake in response to large portion sizes differs between women who have received portion-control training and women who have not received such training. In a crossover design, women come to the laboratory on four occasions to eat a lunch of seven foods varying in energy density. Across meals, all foods are varied in portion size (100%, 125%, 150%, or 175% of baseline amounts). Food and energy intake is determined for each meal. Participants are from two groups: women who completed a one-year weight-loss trial in which they were trained in portion-control strategies, and women who had not received such training (community controls).
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Crossover
- Primary Purpose
- Prevention
- Masking
- Single (Participant)
Eligibility Criteria
- Ages
- 20 Years to 66 Years (Adult, Older Adult)
- Sex
- Female
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Participant in the Portion-Control Strategies Trial (NCT01474759) OR
- •Community control who regularly eats three meals per day
Exclusion Criteria
- •Score on the Eating Attitudes Test indicating symptoms of disordered eating
- •Score on the Zung or Beck questionnaires indicating symptoms of depression
- •Food allergies or restrictions
- •Dislike for foods served in the study
Arms & Interventions
100% Portions
Meal portion size: 100%
Intervention: Meal portion size (Other)
125% Portions
Meal portion size: 125%
Intervention: Meal portion size (Other)
150% Portions
Meal portion size: 150%
Intervention: Meal portion size (Other)
175% Portions
Meal portion size: 175%
Intervention: Meal portion size (Other)
Outcomes
Primary Outcomes
Difference in intake by weight across subject groups
Time Frame: Weeks 1, 2, 3, and 4
Weights (grams) of all food consumed
Difference in energy intake across subject groups
Time Frame: Weeks 1, 2, 3, and 4
Calculated energy intake (kcal) based on weight and energy density of food consumed
Difference in energy density consumed across subject groups
Time Frame: Weeks 1, 2, 3, and 4
Energy density (kcal/gram) of all food consumed
Secondary Outcomes
- Ratings of hunger and satiety across subject groups(Weeks 1, 2, 3, and 4)
Investigators
Barbara J. Rolls
Professor of Nutrition and Director of the Laboratory for the Study of Human Ingestive Behavior
Penn State University