- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05070442
Diet Improvement Through Normative Experimentation (DINE)
Study Overview
Status
Conditions
Detailed Description
The Asia-Pacific is faced with an epidemic of rising rates of chronic disease. Poor diet quality is a demonstrated risk factor for non-communicable diseases. Excess intake of calories, saturated fat and sodium increases the risk of obesity, heart disease, diabetes, and other chronic conditions.
Behavioral economics has emerged as a promising strategy to increase the effectiveness of interventions aimed to address risk factors for non-communicable diseases (NCDs). Yet, there is a gap in knowledge concerning how norm-based messaging and peer influence interventions can be implemented to improve diet quality.
Using a three-arm randomized trial with a 3x3 crossover design, investigators aim to determine whether norm-based messaging and peer comparisons, with or without financial incentives, improve diet quality.
Each participant will be exposed to all of the following intervention arms in random order:
Arm 1: Control arm. Participants will experience an unmodified version of NUSMart which replicates the traditional shopping experience of online grocery stores.
Arm 2: Participants will experience a modified version of NUSMart with norm-based messaging and peer comparison features enabled. Nutri-Score labels will be enabled and displayed on all products within the store. A floating side panel will provide a visual indicator of the participants' average weighted Nutri-Score.
Arm 3: Same as Arm 2, except participants are notified of an additional $5 reward towards participation reimbursement. However, this additional $5 will be forfeited if the basket average weighted Nutri-Score falls below the average of participants' peers'. (Financial incentive leveraging on loss aversion).
Investigators hypothesize the following:
Primary hypothesis: Diet quality, as measured by mean Nutri-Score weighted by number of servings of all basket items, will be greatest when exposed to the intervention with norm-based messaging with incentive (Arm 3), followed by the intervention with norm-based messaging without the incentive (Arm 2), followed by Control (Arm 1).
Investigators will test this hypothesis in total, and separately for foods and beverages given Singapore's focus on reducing intake of sugar-sweetened beverages.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
-
Singapore, Singapore, 169857
- Duke-NUS Graduate Medical School
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Singapore resident
- Age 21 and above
- Must be the primary weekly grocery shopper in their household
Exclusion Criteria:
- Non-Singapore resident
- Non-primary grocery shopper in their household
- Less than 21 years old
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Health Services Research
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
No Intervention: Control Arm (Arm 1)
Participants will experience an unmodified version of NUSMart which replicates the traditional shopping experience of online grocery stores.
|
|
Experimental: Norms Arm (Arm 2)
Participants will experience a modified version of NUSMart with norm-based messaging and peer comparison features enabled.
Nutri-Score labels will be enabled and displayed on all products within the store.
A floating side panel will provide a visual indicator of the participants' average weighted Nutri-Score.
|
Participants are shown a version of NUSMart which includes Nutri-Score labels that are enabled and displayed besides all the products in the store. Additionally, they are shown a video that gives them background information about Nutri-Score labels and describes the following features enabled in this intervention:
Nutri-Score=3.98 was chosen as it is 10% better than the mean Nutri-Score of baskets purchased by participants in the Nutri-Score labelled intervention arm of a prior study. |
Experimental: Norms and Incentive Arm (Arm 3)
Same as Arm 2, except participants are notified that they have been awarded an additional $5 towards their participation reimbursement.
However, this additional $5 will be forfeited if their basket average weighted Nutri-Score falls below the average of their peers'.
(Financial incentive leveraging on loss aversion).
|
Participants are shown a version of NUSMart which includes Nutri-Score labels that are enabled and displayed besides all the products in the store. Additionally, they are shown a video that gives them background information about Nutri-Score labels and describes the following features enabled in this intervention:
Nutri-Score=3.98 was chosen as it is 10% better than the mean Nutri-Score of baskets purchased by participants in the Nutri-Score labelled intervention arm of a prior study.
Participants are informed that they have received an additional $5 towards their participant reimbursement.
However, this amount will be forfeited if they check-out with a basket average Nutri-Score (weighted by the number of servings) that falls below the average Nutri-Score of "other shoppers" i.e. 3.98.
An indicator on the screen that informs the participants of this potential forfeiting will be included.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Diet Quality
Time Frame: After completion of data collection, an average of about 5 months
|
Diet quality, as measured by raw Nutri-Score points (-15 to 40) weighted by number of servings of all basket items.
Here, a smaller value means a better outcome.
Raw Nutri-Score is measured according to the guidelines from the Sante Publique France.
|
After completion of data collection, an average of about 5 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Average Nutri-Score
Time Frame: After completion of data collection, an average of about 5 months
|
Average Nutri-Score (1 to 5) weighted by number of servings of all basket items.
Here, a higher value means a better outcome.
This is calculated by converting Nutri-Score letters to numbers such that Nutri-Score E is 1, D is 2 and so on till Nutri-Score A which is 5.
|
After completion of data collection, an average of about 5 months
|
Average Calories
Time Frame: After completion of data collection, an average of about 5 months
|
Average calories per shopping trip.
|
After completion of data collection, an average of about 5 months
|
Average Sodium
Time Frame: After completion of data collection, an average of about 5 months
|
Average sodium per shopping trip.
|
After completion of data collection, an average of about 5 months
|
Average Sugar
Time Frame: After completion of data collection, an average of about 5 months
|
Average sugar per shopping trip.
|
After completion of data collection, an average of about 5 months
|
Average Fat
Time Frame: After completion of data collection, an average of about 5 months
|
Average fat per shopping trip.
|
After completion of data collection, an average of about 5 months
|
Average Saturated Fat
Time Frame: After completion of data collection, an average of about 5 months
|
Average saturated fat per shopping trip.
|
After completion of data collection, an average of about 5 months
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- NIHA-2018-002 (Study 2)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Diet Quality
-
Duke-NUS Graduate Medical SchoolCompleted
-
Duke-NUS Graduate Medical SchoolNational University of SingaporeCompleted
-
University of Kansas Medical CenterNot yet recruiting
-
Duke-NUS Graduate Medical SchoolWorld Bank; Public Health Authority of Saudi ArabiaCompleted
-
VA Office of Research and DevelopmentRecruitingPhysical Activity | Diet Quality | Peer LeadersUnited States
-
Boston Children's HospitalCompletedChildren's Diet Quality | Health-related Social ProblemsUnited States
-
University of MinnesotaCompletedFood Insecurity | Healthy Diet | Nutritional Quality | Food Legislation | Food Stamp ProgramUnited States
-
Duke-NUS Graduate Medical SchoolCompleted
-
University of North Carolina, Chapel HillCompletedWeight Loss | Diet QualityUnited States
-
University of AdelaideAustralian Catholic University; La Trobe UniversityRecruitingDiet Quality | Time-restricted EatingAustralia
Clinical Trials on Norm-based messaging and peer comparison features
-
Dartmouth-Hitchcock Medical CenterAgency for Healthcare Research and Quality (AHRQ)CompletedDelivery of Health CareUnited States
-
RANDUniversity of California, Los Angeles; University of Michigan; University of... and other collaboratorsActive, not recruiting
-
University of PennsylvaniaNational Institute on Aging (NIA); University of WashingtonActive, not recruitingFlu | Behavior, Health | Flu VaccinationUnited States
-
University of Massachusetts, WorcesterNational Institute on Drug Abuse (NIDA)Enrolling by invitationVaping | E-cigarette UseUnited States
-
University of Southern CaliforniaNational Institute on Aging (NIA)CompletedRespiratory Tract Infections
-
VA Office of Research and DevelopmentArizona State UniversityRecruiting
-
Herb CleggCompletedUpper Respiratory Infection | Acute Otitis Media | Acute Bacterial Sinusitis
-
Northwestern UniversityEunice Kennedy Shriver National Institute of Child Health and Human Development...Active, not recruitingAdolescent HIV InfectionNigeria
-
University of WashingtonNational Institute on Drug Abuse (NIDA)UnknownHIV/AIDS | Adherence, Medication | Drug UseUnited States
-
University of Southern CaliforniaNational Institute on Aging (NIA)CompletedAcute Respiratory Infections (ARIs)United States