Influence of front-of-pack labelling schemes on consumer health perceptions and purchase behaviours in Trinidad and Tobago

Effects of front-of-pack labelling schemes on consumer health perceptions and purchase behaviours in Trinidad and Tobago: a parallel randomized control trial

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN10830335

Enrollment

1920

Registered

2025-09-02

Start date

2025-09-08

Completion date

Unknown

Last updated

2025-09-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Consumer health perceptions and purchase behaviours Nutritional, Metabolic, Endocrine

Interventions

The randomisation of the experimental conditions and groups is completed by adopting a Williams design to ensure the order of categories of products and the order of products within categories was ran

the only difference across groups is the front-of-package labelling (FOPL) scheme they feature. Mock-ups shown to participants feature solely one of the following FOPL schemes tested, according to the

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Adult supermarket shoppers 2. Residing in Trinidad & Tobago 3. Aged 18 years old or older

Exclusion criteria

Exclusion criteria: 1. Visually impaired people 2. Persons unable to give informed consent 3. People who deny being part of this study 4. People who do not meet the inclusion criteria

Design outcomes

Primary

Measure	Time frame
Contribution of the different front-of-package labeling (FOPL) schemes to improving the decision of participants to buy the least harmful option more often, the selection of the least harmful option more often and the correct identification of sugars, sodium and/or saturated fats found to be in excess in the products more often, measured comparing correct responses of participants to the stimuli in different experimental/control groups at one timepoint	—

Measure

Time frame

Contribution of the different front-of-package labeling (FOPL) schemes to improving the decision of participants to buy the least harmful option more often, the selection of the least harmful option more often and the correct identification of sugars, sodium and/or saturated fats found to be in excess in the products more often, measured comparing correct responses of participants to the stimuli in different experimental/control groups at one timepoint

—

Secondary

Measure	Time frame
The impact of sociodemographic variables, such as gender, age, and education level, on the differences observed in the performance of various front-of-package labeling schemes. This assessment will be measured by administering a structured questionnaire to respondents after they are shown mock-up products and provide their responses. The questionnaire will capture their opinions and perceptions of the labeling schemes at one timepoint. The goal is to determine the extent to which sociodemographic factors contribute to the variations observed in the respondents' evaluations of the labeling schemes.	—

Measure

Time frame

The impact of sociodemographic variables, such as gender, age, and education level, on the differences observed in the performance of various front-of-package labeling schemes. This assessment will be measured by administering a structured questionnaire to respondents after they are shown mock-up products and provide their responses. The questionnaire will capture their opinions and perceptions of the labeling schemes at one timepoint. The goal is to determine the extent to which sociodemographic factors contribute to the variations observed in the respondents' evaluations of the labeling schemes.

—

Countries

Trinidad and Tobago

Contacts

Public ContactAndrew Dahanoo

andrewdhanoo@hotmail.com+1 868 (0)6073288

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026