Increased Proportion of Lower Energy Density Items vs. Nutritional Labelling at an Online Supermarket
NCT ID: NCT04340791
Last Updated: 2020-11-03
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
1000 participants
INTERVENTIONAL
2020-04-13
2020-05-13
Brief Summary
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
PREVENTION
NONE
Study Groups
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Default proportion & no labelling
No intervention:
Default proportion condition (33% lower energy density items - 67% higher energy density items). Lower energy density items will be defined as lower ED ≤ median of ED distribution within a food category.
No labelling.
No interventions assigned to this group
Default proportion & labelling
When energy density of a food item ≤ median of energy density distribution within a food category, "healthier choice" badges will be added to the food item pictures on the online supermarket. Instructions will introduce the badges to the participants as "In the online supermarket, the green tick allows you to see which products (e.g. muesli) in each product category (e.g. cereals) are healthier choices with fewer calories per gram than most other products in the same category."
Labelling
When energy density of an item ≤ median of ED distribution within a food category, "healthier choice" badges will be added to the food item pictures on the online supermarket. Instructions when logging-into the platform will introduce the badges to the participants: "In the online supermarket, the green tick allows you to see which products (e.g. muesli) in each product category (e.g. cereals) are healthier choices with fewer calories per gram than most other products in the same category."
Increased proportion & no labelling
The proportion of lower energy density items vs. higher energy density items will be reversed (67% lower - 33% higher) relative to the default proportion condition (33% lower - 67% higher). Lower energy density items will be defined as lower ED ≤ median of ED distribution within a food category.
Increased proportion of lower energy density items
The proportion of lower energy density vs. higher energy density items will be reversed (67% lower - 33% higher) relative to the default proportion condition (D and DL) (33% lower - 67% higher). Lower energy density items will be defined as lower energy density ≤ median of energy density distribution within a food category.
Increased proportion & labelling
The proportion of lower energy density items vs. higher energy density items will be reversed (67% lower - 33% higher) relative to the default proportion condition (33% lower - 67% higher). Lower energy density items will be defined as lower ED ≤ median of ED distribution within a food category.
When energy density of a food item ≤ median of energy density distribution within a food category, "healthier choice" badges will be added to the food item pictures on the online supermarket. Instructions will introduce the badges to the participants as "In the online supermarket, the green tick allows you to see which products (e.g. muesli) in each product category (e.g. cereals) are healthier choices with fewer calories per gram than most other products in the same category."
Increased proportion of lower energy density items
The proportion of lower energy density vs. higher energy density items will be reversed (67% lower - 33% higher) relative to the default proportion condition (D and DL) (33% lower - 67% higher). Lower energy density items will be defined as lower energy density ≤ median of energy density distribution within a food category.
Labelling
When energy density of an item ≤ median of ED distribution within a food category, "healthier choice" badges will be added to the food item pictures on the online supermarket. Instructions when logging-into the platform will introduce the badges to the participants: "In the online supermarket, the green tick allows you to see which products (e.g. muesli) in each product category (e.g. cereals) are healthier choices with fewer calories per gram than most other products in the same category."
Interventions
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Increased proportion of lower energy density items
The proportion of lower energy density vs. higher energy density items will be reversed (67% lower - 33% higher) relative to the default proportion condition (D and DL) (33% lower - 67% higher). Lower energy density items will be defined as lower energy density ≤ median of energy density distribution within a food category.
Labelling
When energy density of an item ≤ median of ED distribution within a food category, "healthier choice" badges will be added to the food item pictures on the online supermarket. Instructions when logging-into the platform will introduce the badges to the participants: "In the online supermarket, the green tick allows you to see which products (e.g. muesli) in each product category (e.g. cereals) are healthier choices with fewer calories per gram than most other products in the same category."
Eligibility Criteria
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Inclusion Criteria
* Aged ≥ 18 years
* Fluent in English
* Have access to a computer and Internet
* Responsible for a substantial proportion of household grocery shopping
Exclusion Criteria
* Any dietary restriction (vegetarian, vegan, gluten-free, sugar-free, dairy or lactose free, food allergy, other)
18 Years
ALL
Yes
Sponsors
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University of Liverpool
OTHER
Responsible Party
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Eric Robinson
Principal Investigator
Locations
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University of Liverpool
Liverpool, Merseyside, United Kingdom
Countries
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Provided Documents
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Document Type: Study Protocol, Statistical Analysis Plan, and Informed Consent Form
Study Documents
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Document Type: Study Protocol
View DocumentDocument Type: Statistical Analysis Plan
View DocumentDocument Type: Informed Consent Form
View DocumentOther Identifiers
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803194 1B3
Identifier Type: -
Identifier Source: org_study_id