Effectiveness of Information-based Versus Structural Interventions on Food Choices by Socioeconomic Position: a Randomized Controlled Trial in an Experimental Online Supermarket
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- University of Liverpool
- Enrollment
- 1,000
- Locations
- 2
- Primary Endpoint
- Mean ED of the food items purchased (kcal/100g)
Study Overview
Brief Summary
This study will be a 2x2 randomised controlled trial with information-based intervention (no labelling / labelling) and structural intervention (default proportion / increased proportion of lower energy density food items) as between-subject factors and energy density (kcal/g) of food purchases during an online supermarket-shopping task as dependent variable. This study will use an online supermarket platform developed to mimic an online supermarket website and participants will be asked to complete a shopping task using a pre-determined shopping list of 10 items.
Detailed Description
See attached protocol documents.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Prevention
- Masking
- None
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •United Kingdom residents
- •Aged ≥ 18 years
- •Fluent in English
- •Have access to a computer and Internet
- •Responsible for a substantial proportion of household grocery shopping
Exclusion Criteria
- •Unable to provide informed consent and to comply with the study requirements
- •Any dietary restriction (vegetarian, vegan, gluten-free, sugar-free, dairy or lactose free, food allergy, other)
Outcomes
Primary Outcomes
Mean ED of the food items purchased (kcal/100g)
Time Frame: 20 minutes (the time frame denotes time taken to make the food shopping task online and there is no follow up)
Calculated as the sum of the energy of the purchased items (kcal) divided by the sum of their weight (g) and multiplied by 100.
Secondary Outcomes
- Energy from total sugar (% of total energy)(20 minutes (the time frame denotes time taken to make the food shopping task online and there is no follow up))
- Total energy of the food items purchased (kcal)(20 minutes (the time frame denotes time taken to make the food shopping task online and there is no follow up))
- Energy from saturated fatty acids (SFA) (% of total energy)(20 minutes (the time frame denotes time taken to make the food shopping task online and there is no follow up))
- Salt content (g/100g)(20 minutes (the time frame denotes time taken to make the food shopping task online and there is no follow up))
- Proportion of lower energy density food items in the basket of foods purchased(20 minutes (the time frame denotes time taken to make the food shopping task online and there is no follow up))
- Cost (GPB)(20 minutes (the time frame denotes time taken to make the food shopping task online and there is no follow up))
Investigators
Eric Robinson
Principal Investigator
University of Liverpool