N/A
N=6,622
Climate Impact Label Design and Fast-Food Meal Selection
Food Selection
Bottom Line
View on ClinicalTrials.gov: NCT06678178 ↗Enrolled (actual)
6,622
Serious AEs
0.0%
Results posted
Jan 2026
Primary outcome: Primary: Modified Nutrient Profile Index Score — 50.6; 51.3; 51.3; 50.8 score on a scale
Study Design & Population
- Study type
- Interventional
- Phase
- N/A
- Interventions
- Control (QR) Labels (Behavioral); Warning High Climate Impact Labels (Behavioral); Traffic Light Labels (Behavioral); Climate Grade Labels (Behavioral); Numeric Carbon Footprint Labels (Behavioral)
- Age
- Adult, Older Adult · 18+ yrs
- Sex
- All
- Sponsor
- Johns Hopkins Bloomberg School of Public Health
- Primary completion
- Dec 2024
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Modified Nutrient Profile Index Score |
50.6; 51.3; 51.3; 50.8; 51.0 | — |
| SECONDARY Total Greenhouse Gas Emissions as Assessed by Cumulative Total Kilograms of Carbon Equivalent (kgCO2e) Per Kilogram |
27.5; 23.9; 22.6; 24.6; 24.7 | — |
| SECONDARY Perceived Message Effectiveness (PME) as Assessed by the University of North Carolina (UNC) PME Scale |
1.8; 2.7; 2.6; 2.5; 2.3 | — |
| SECONDARY Total Energy (Calories) Selected |
1579.3; 1540.6; 1552.5; 1556.8; 1535.3 | — |
| SECONDARY Number of Participants Who Selected Sugar-sweetened Beverage |
652; 598; 617; 626; 662 | — |
Summary
The primary objective of this study is to test the relative effects of climate-impact menu label designs on the healthfulness of consumers' fast-food meal choices. Participants will complete a hypothetical online meal ordering task using a survey which emulates the online menu of a burger restaurant chain. Participants will be randomized for exposure to menus featuring one of five labeling conditions. Secondary objectives include examining total greenhouse gas emissions per meal order and, through a post-order survey, perception of labels between the conditions.
Eligibility Criteria
Inclusion Criteria
- 18 years of age or older
- Member of the CloudResearch panel
- Residing in the United States
Exclusion Criteria
- Under 18 years of age
- Not residing in the United States
- Completed the survey implausibly quick based on the distribution of the time to complete the survey among all participants
- Failed the built-in Qualtrics survey fraud detection measures
Data sourced from ClinicalTrials.gov (NCT06678178). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.