Encouraging Healthy and Sustainable Dietary Substitutions

Not Applicable

Completed

• Conditions: Food Selection

• Registration Number: NCT06175026
• Lead Sponsor: Stanford University

Brief Summary

The aim of this study is to examine emerging adults' responses to dietary substitution messages about health, the environment, or both health and the environment.

Detailed Description

This online study will examine emerging adults' responses to dietary substitution messages about 4 different topics. Participants will be randomized to 1 of 4 topic arms: 1) Control (neutral topic, not related to health or the environment); 2) Health topic; 3) Environment topic; 4) Health and Environment topic. Participants will view messages about each of 4 dietary substitutions: replacing red meat with chicken or vegetarian options; replacing dairy milk with non-dairy milk; replacing juice with whole fruit; and replacing sugar-sweetened beverages with water. For each dietary substitution, participants will view 2 messages about their assigned topic, with the 2 messages shown in random order. Participants will rate each message on perceived message effectiveness (primary outcome).

Study Timeline

• Study First Submitted: 2023-11-30
• Study First Submitted QC: 2023-12-08
• Study First Posted: 2023-12-18
• Study Start: 2024-01-22
• Primary Completion: 2024-02-02
• Study Completion: 2024-02-02
• Results First Submitted: 2024-10-16
• Status Verified: 2024-11
• Results First Submitted QC: 2024-11-07
• Last Update Submitted: 2024-11-07
• Results First Posted: 2024-11-11
• Last Update Posted: 2024-11-11

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 1753

Inclusion Criteria

• Age between 18-25 years
• Reside in the United States
• Ability to complete a survey in English

Exclusion Criteria

• Older than 25 years; younger than 18 years
• Reside outside of the United States
• Unable to complete a survey in English

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Perceived Message Effectiveness	Survey questions administered after participant viewed each message; overall survey took up to 20 minutes	Participants will rate each message on perceived message effectiveness (PME) for encouraging participants to make the target dietary substitution. PME will be assessed with 4 items \[the text shown in brackets will be tailored to each substitution\]: 1. How much does this message discourage you from wanting to \[eat beef and pork / drink juice / drink cow's milk / drink sugary drinks\]?; 2. How much does this message make \[eating beef and pork, etc.\] seem unpleasant to you?; 3. How much does this message make you concerned about the effects of \[eating beef and pork, etc.\]?; 4. How much does this message make you want to \[eat chicken or vegetarian options instead of beef and pork, etc.\]?; The response options for each item are: 1=Not at all, 2=Very little, 3=Somewhat, 4=Quite a bit, 5=A great deal.; Investigators will average responses to these 4 items to create a perceived message effectiveness score. Higher scores indicated higher perceived message effectiveness.

Trial Locations

Locations (1)

Stanford School of Medicine; 🇺🇸 Palo Alto, California, United States