Using the Norm Range to Predict the Effect of Food Portion Size Reductions on Compensation Over 5 Days

Portion Size Clinical Trial

Official title:

Using the Norm Range to Predict the Effect of Food Portion Size Reductions on Compensation

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03811210
• Other study ID #: Portion size trial
• Status: Completed
• Phase: N/A
• Start date: February 6, 2018
• Est. completion date: December 10, 2018

Study information

• Verified date: January 2019
• Source: University of Liverpool
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Reducing food portion size is a potential strategy to reduce energy intake. However it is unclear at what point consumers compensate for reductions in portion size by increasing energy intake from other items. This could result in no overall benefit of reducing food portion sizes. The investigators tested the hypothesis that reductions to the portion size of components of a main meal will only result in significant compensatory eating when the reduced portion size is no longer visually perceived as 'normal'. In a crossover experiment, participants were served different sized portions during lunch and dinner over 5 days: a 'large-normal', a 'small-normal', and a 'smaller than normal' portion. Intake from all other meal components consumed in the laboratory were measured.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 39
• Est. completion date: December 10, 2018
• Est. primary completion date: December 7, 2018
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 60 Years

Eligibility

Inclusion Criteria:

• willing to consume the test foods

• BMI between 22.5 - 32.5

Exclusion Criteria:

• food allergies, intolerances or specific dietary requirements (including being vegetarian or vegan)

• history of eating disorders

• taking medication which affected appetite

• participated in a portion size studies in the past 12 months, or in dieting or weight loss trials in the past 4 weeks

Related Conditions & MeSH terms

• Portion Size

Intervention

Behavioral:
• portion size
Smaller than normal portion size - the intervention is the main meal component size perceived as 'smaller than normal' that participants are provided with during lunch and dinner in the laboratory. Small-normal portion size - the intervention is the main meal component size perceived as 'small-normal' that participants are provided with during lunch and dinner in the laboratory. Large-normal portion size - the intervention is the main meal component size perceived as 'large-normal' that participants are provided with during lunch and dinner in the laboratory.

Locations

Country	Name	City	State
United Kingdom	Ashleigh Haynes	Liverpool	Merseyside

Sponsors (2)

Lead Sponsor	Collaborator
University of Liverpool	Medical Research Council

Country where clinical trial is conducted

United Kingdom, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Acute compensatory energy intake	Energy intake from main meal components that are not varied by portion size	Immediate (within single meal occasion)
Primary	Total meal energy intake	Energy intake from all main meal components (including those that are and are not varied by portion size)	Immediate (within single meal occasion)
Primary	Total daily energy intake	Energy intake from all foods consumed, including those provided in the laboratory and those self-reported	Over 5 x full days
Secondary	Moderate-vigorous physical activity	Moderate-vigorous physical activity (recorded using accelerometer device)	Over 5 x full days
Secondary	Discretionary Leisure-time physical activity	Discretionary Leisure-time physical activity (recorded with self-report measure International Physical Activity Questionnaire)	Over 5 x full days
Secondary	Appetite	Hunger and fullness sensations before and after laboratory-based meals (self-reported on visual analog scales anchored at 0 'not at all' to 100 'extremely')	Over 5 x full days (measured before and after each meal occasion)