The Role of Satiety in the Effect of Portion Size on Intake

Not Applicable

Terminated

• Conditions: Feeding Behavior
• Interventions: Other: 125% Portion Size; Other: 100% Portion Size; Other: 150% Portion Size; Other: 175% Portion Size

• Registration Number: NCT03409601
• Lead Sponsor: Penn State University

Brief Summary

The study uses a crossover design in which the portion size of food is varied at each meal. Across four test meals, subjects will be served four different portions of food, and intake will be determined from pre- and post-meal food weights. The first visit will be a screening visit, at which subjects will complete the consent form, have their height and weight measured, and rate the taste of the study food. Test meals will be scheduled once a week for four weeks. At visits 2-5, subjects will eat lunch and rate characteristics of the meal. At visit 6, subjects will complete various questionnaires. The objective of this study is to determine whether any individual characteristics related to satiety influence the effect of portion size on intake.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2018-01-18
• Study First Submitted QC: 2018-01-18
• Study First Posted: 2018-01-24
• Study Start: 2018-04-02
• Primary Completion: 2018-12-14
• Study Completion: 2018-12-14
• Status Verified: 2019-03
• Last Update Submitted: 2019-03-14
• Last Update Posted: 2019-03-18

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 14

Inclusion Criteria

• Be willing and able to travel to Penn State University Park campus weekly for meals
• Be a man or woman 18 - 60 years old
• Regularly eat 3 meals/day
• Be willing to avoid alcohol the day before and during test days
• Have a body mass index between 18.0 and 35.0 kg/m-squared
• Be willing to refrain from eating after 10 pm the evening before test sessions

Exclusion Criteria

• A smoker
• An athlete in training
• Pregnant or breastfeeding at the time of screening
• Have taken prescription or non-prescription drugs that may affect appetite or food intake within the last 3 months
• Dislike or be unable to eat the test foods (because of allergies, intolerance, or dietary restrictions)
• Currently dieting to gain or lose weight
• Have a health condition that affects appetite
• Have participated in a similar study in our lab in the past year

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
125% Portion Size	125% Portion Size	Test meal consists of food portion size that is 125% the size of baseline portion.
100% Portion Size	100% Portion Size	Test meal consists of baseline (100%) portion size of meal.
150% Portion Size	150% Portion Size	Test meal consists of food portion size that is 150% the size of baseline portion.
175% Portion Size	175% Portion Size	Test meal consists of food portion size that is 175% the size of baseline portion.

Primary Outcome Measures

Name	Time	Method
Differences in intake by weight	Weeks 1, 2, 3, and 4	Weights (grams) of all foods consumed
Differences in energy intake	Weeks 1, 2, 3, and 4	Calculated energy intake (kcal) based on weight and energy density of food consumed

Secondary Outcome Measures

Name	Time	Method
Sensory-specific satiety	Weeks 1, 2, 3, and 4	Change in taste pleasantness of eaten foods compared to uneaten foods
Ratings of meal characteristics	Weeks 1, 2, 3, and 4	100-point visual analog scales
Eating rate	Weeks 1, 2, 3, and 4	Assessed from meal duration and number of bites taken
Ratings of hunger and satiety	Weeks 1, 2, 3, and 4	100-point visual analog scales
Ratings of sensory characteristics of the food	Weeks 1, 2, 3, and 4	100-point visual analog scales

Trial Locations

Locations (1)

The Pennsylvania State University; 🇺🇸 University Park, Pennsylvania, United States