Feeding Behaviors
Conditions
Keywords
Portion Size
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).
Interventions
OTHERMeal portion size
Sponsors
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Penn State University
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
PREVENTION
Masking
SINGLE (Subject)
Eligibility
Sex/Gender
FEMALE
Age
20 Years to 66 Years
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Difference in energy intake across subject groups | Weeks 1, 2, 3, and 4 | Calculated energy intake (kcal) based on weight and energy density of food consumed |
| Difference in intake by weight across subject groups | Weeks 1, 2, 3, and 4 | Weights (grams) of all food consumed |
| Difference in energy density consumed across subject groups | Weeks 1, 2, 3, and 4 | Energy density (kcal/gram) of all food consumed |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Ratings of hunger and satiety across subject groups | Weeks 1, 2, 3, and 4 | 100-point visual analog scales |
Other
| Measure | Time frame | Description |
|---|---|---|
| Ratings of food taste across subject groups | Week 5 | 100-point visual analog scales |
| Ratings of food healthfulness across subject groups | Week 5 | 100-point visual analog scales |
Countries
United States
Outcome results
None listed