Study Results
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View full resultsBasic Information
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COMPLETED
NA
4160 participants
INTERVENTIONAL
2021-10-18
2021-10-28
Brief Summary
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Procedures (methods): Participants will be recruited from Prime Panels (an online panel research company). Following online consent, participants will be assigned to one of four trial arms: 1) Control (no warning and no tax), 2) Warnings (all products that contain red meat have a health warning and environmental warning), 3) Tax (30% tax on products that contain red meat), and 4) Combined warning and tax (all products that contain red meat will have the two warnings and a 30% tax). Then, participant will enter an online grocery store reflecting their assigned arm. The participant will be instructed to complete a shopping task in the online grocery store. After completing the shopping task, participants will be redirected to an online survey and answer a series of questions about the shopping task, labels (excluding tax and control groups), and taxes (excluding warning and control groups). Questions will also include standard demographic and health related variables.
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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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Control
Products that contain red meat will not have warning labels or an increase in price.
Control
Participants will complete a shopping task in the online grocery store, and the products that contain red meat will not have warning labels or a 30% increase in price.
Warning Labels
The warning labels are black octagons with white text that appear next to images of products that contain red meat. One label says "WARNING: Eating red meat contributes to colon and rectal cancer" and the other label says "WARNING: Eating red meat harms the environment."
Warning Labels
While completing the shopping task in the online grocery store, the health and environmental warning labels will appear next to the image of every product that contains red meat.
Tax
The tax is a 30% increase in the price of products that contain red meat.
Tax
While completing the shopping task in the online grocery store, all products containing red meat will have a 30% increase in price.
Combined Warning Labels and Tax
The Combined Warning Labels and Tax arm features both the warning labels and tax. The warning labels are black octagons with white text that appear next to images of products that contain red meat. One label says "WARNING: Eating red meat contributes to colon and rectal cancer" and the other label says "WARNING: Eating red meat harms the environment." The tax is a 30% increase in the price of red meat products.
Combined Warning Labels and Tax
While completing the shopping task in the online grocery store, all products containing red meat will have the health and environmental warning labels appear next to the product image and a 30% increase in price.
Interventions
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Control
Participants will complete a shopping task in the online grocery store, and the products that contain red meat will not have warning labels or a 30% increase in price.
Warning Labels
While completing the shopping task in the online grocery store, the health and environmental warning labels will appear next to the image of every product that contains red meat.
Tax
While completing the shopping task in the online grocery store, all products containing red meat will have a 30% increase in price.
Combined Warning Labels and Tax
While completing the shopping task in the online grocery store, all products containing red meat will have the health and environmental warning labels appear next to the product image and a 30% increase in price.
Eligibility Criteria
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Inclusion Criteria
* Consumes red meat at least once per week.
* Responsible for at least 50% of grocery shopping for the household.
* Lives in the United States
Exclusion Criteria
18 Years
ALL
Yes
Sponsors
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Wellcome Trust
OTHER
University of Edinburgh
OTHER
National Heart, Lung, and Blood Institute (NHLBI)
NIH
University of North Carolina, Chapel Hill
OTHER
Responsible Party
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Principal Investigators
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Lindsey S Taillie, PhD
Role: PRINCIPAL_INVESTIGATOR
University of North Carolina, Chapel Hill
Lindsay Jaacks, PhD
Role: PRINCIPAL_INVESTIGATOR
University of Edinburgh
Locations
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Carolina Population Center
Chapel Hill, North Carolina, United States
Countries
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References
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Willits-Smith A, Taillie LS, Jaacks LM, Frank SM, Grummon AH. Effects of red meat taxes and warning labels on food groups selected in a randomized controlled trial. Int J Behav Nutr Phys Act. 2024 Apr 15;21(1):39. doi: 10.1186/s12966-024-01584-9.
Taillie LS, Bercholz M, Prestemon CE, Higgins ICA, Grummon AH, Hall MG, Jaacks LM. Impact of taxes and warning labels on red meat purchases among US consumers: A randomized controlled trial. PLoS Med. 2023 Sep 18;20(9):e1004284. doi: 10.1371/journal.pmed.1004284. eCollection 2023 Sep.
Provided Documents
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Document Type: Study Protocol
Document Type: Statistical Analysis Plan
Other Identifiers
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19-3349
Identifier Type: -
Identifier Source: org_study_id
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