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Evaluating the Effectiveness of Within Versus Across-Category Front-of-Package Lower-Calorie Labelling on Food Demand

NCT04165447 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 146

Last updated 2019-11-18

No results posted yet for this study

Summary

The important role that diet plays in health and disease is well established, as is its association with rising rates of obesity-a phenomenon of increasing concern in Singapore. Changes in lifestyle patterns, including a movement towards a more western-style diet with an emphasis on pre-packaged and fast food, have contributed to the upward trend in weight. This study aims to test two competing approaches for calorie labelling in efforts to reduce total calories purchased. In Arm 1 (termed across category labelling) a low calorie logo will be displayed on the 20% of products on the web store that are lowest in calories per serving. Arm 2 will display this logo on the 20% of products that are lowest in calories per serving within each product category (termed within category labelling). Arm 3 is the Control condition which will not display any logo on any products.

For our primary outcome, the investigators hypothesize that the proportion of labelled products (or those that would have been labelled if not in control arm) purchased in each intervention arm will be greater than in control.

For secondary hypotheses the investigators expect the following ordering across the three (Control, Within category, Across category) arms:

1. total calories (adjusted for household size): C \> A \> W
2. calories per serving: C \> A \> W
3. calories per dollar spent: W \> A \> C
4. total dollars spent (adjusted for household size) : W \> A \> C

Conditions

  • Food Selection

Interventions

BEHAVIORAL

Front-of-pack labeling strategy

We designed a simple 'Lower Calorie' directive logo. We labeled the 20% of products with the lowest calories per serving within or across categories. All serving sizes used in this study were the average of the serving sizes within each category. Prior to conducting the analysis, we standardized the serving size by using the mean serving size within each subcategory. This standardization ensures that similar products are compared equally as serving sizes can be arbitrarily set by the manufacturers. The labels were displayed below the product images.

Sponsors & Collaborators

Study Design

Allocation
RANDOMIZED
Purpose
HEALTH_SERVICES_RESEARCH
Masking
TRIPLE
Model
CROSSOVER

Eligibility

Min Age
21 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2017-10-01
Primary Completion
2018-04-30
Completion
2018-04-30

Countries

  • Singapore

Study Locations

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Entities

Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04165447 on ClinicalTrials.gov