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Completed

NCT Number: NCT04022694

Preventing Non-communicable Diseases in Guatemala Through Sugary Drink Reduction

Sugar-sweetened beverages are a significant contributor to adult and childhood obesity in Guatemala. Policies to place health warning labels on sugar-sweetened beverages are being pursued, but there is little empirical data on how such labels influence people. The primary aim of this study is to test the association between sugar-sweetened beverage (SSB) warning posters compared to control posters and change in SSBs purchased compared to baseline by adolescents shopping at school cafeterias in Guatemala City, Guatemala. The hypothesis is that posters with information warning people of the health harms associated with overconsuming SSBs and promoting low sugar beverages will be associated with greater reductions in SSB purchases compared to a control poster.

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Key information

Conditions

Food Preferences Behavior Feeding Behavior

Age range

12 year–18 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Universidad Rafael Landivar

Guatemala City, Guatemala

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Between 12 and 18 years old
  • Made a food or beverage purchase
  • Has permission from parent or caregiver to participate
  • Has not yet completed the purchase assessment

Exclusion criteria

  • Under 12 or over 18 years old
  • Did not make a food or beverage purchase
  • Parent or caregiver refused to give child permission to participate
  • Already participated in the purchase assessment

Treatment and study plan

Exposure to beverage health information

Behavioral

Red stop sign and avoidance message for sugar-sweetened beverages and green check mark and promotion message for non-sugar-sweetened beverage nutrition information

Exposure to beverage calorie information

Behavioral

Calories for sugar-sweetened and non-sugar-sweetened beverages

Primary outcomes

  1. Volume of SSBs Per Transaction

    Time frame: Through study period (either 4 weeks baseline, or 4 weeks intervention)

    Total milliliters of SSBs per transaction from sales data

  2. Beverage Calories Per Transaction

    Time frame: Through study period (either 4 weeks baseline or 4 weeks intervention)

    Total number of calories for all beverages (SSBs and non-SSBs) per transaction from sales data

Secondary outcomes

  1. Total Calories Per Transaction

    Time frame: Through time frame (either 4 weeks baseline, or 4 weeks intervention)

    Total number of calories for all food and beverages (SSBs and non-SSBs) per transaction from purchase assessments (e.g., calories from Coke + bag of chips)

Other outcomes

  1. Percentage of Participants With Transactions With SSBs Out of All Food and Beverage Transactions

    Time frame: 4-week baseline and 4-week intervention

    Percentage of participants with transactions that have sugar sweetened beverages out of all participants who had food and beverage transactions

  2. Percentage of Participants With Transactions With SSBs Out of All Beverage Transactions

    Time frame: 4-week baseline and 4-week intervention

    Percentage of participants with transactions that have sugar sweetened beverages out of all participants who had beverage transactions

  3. Unhealthy Perceptions of SSBs

    Time frame: 4 weeks baseline, 4 weeks intervention

    Average of perceptions of healthiness (measured on Likert scales) for two items (1=Extremely unhealthy; 7=Extremely healthy, lower values are more accurate)

  4. Healthy Perceptions of Non-SSBs

    Time frame: 4 weeks baseline, 4 weeks intervention

    Average of perceptions of healthiness (measured on Likert scales) for two items (1=Extremely unhealthy; 7=Extremely healthy, higher values are more accurate)

  5. Perceived Influence of Poster Among Those Who Saw it

    Time frame: During intervention, 4 weeks

    "Do you think the poster influenced what you purchased?" (1=Not at all; 5=Very much, higher values in the intervention condition indicate the intervention is perceived to be effective)

  6. Poster Message Trust

    Time frame: During intervention, 4 weeks

    "How much do you trust the information on the poster?" (1=Not at all; 5=Very much, higher values in the intervention condition indicate the intervention is perceived to be trustworthy)

Sponsors and collaborators

Lead sponsor

University of Pennsylvania

Other

Collaborators

  • Fogarty International Center of the National Institute of Health
  • Universidad Rafael Landivar

Registry information

Important dates

Study start
2019
Primary completion
2019
Study completion
2019
First posted
Jul 17, 2019
Registry last updated
Mar 25, 2021

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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