Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
6000 participants
INTERVENTIONAL
2016-04-30
2016-07-31
Brief Summary
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Detailed Description
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Investigators will collect baseline data for two weeks on beverage sales at the hospital cafe. Following this data collection investigators will introduce a calorie label which reads "Each beverage contains \[lower calorie bound\]-\[upper calorie bound\] calories per container. 2,000 calories a day is used for general nutrition advice but calorie needs vary." These signs will be posted for two weeks and investigators will collect sales data. Following this intervention investigators will remove the signs and collect sales data for two weeks. At the end of this no label period, investigators will introduce the second intervention, a warning label. This label will read "WARNING: Drinking beverages with added sugar(s) contributes to obesity, diabetes, and tooth decay." This label will also be posted for two weeks and investigators will collect sales data. Investigators will then remove these signs and collect sales data for two weeks. Finally, investigators will introduce the third intervention: a warning label with graphic labels. This label will read "WARNING: Drinking beverages with added sugar(s) contributes to obesity, diabetes and tooth decay." However this sign will also include a visual depiction of each health consequence. Investigators will collect sales data for this two week period. After this intervention investigators will collect sales data for an additional two weeks and then administer a brief survey to cafeteria customers to better understand their impressions of the labels.
Conditions
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Study Design
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RANDOMIZED
CROSSOVER
TREATMENT
NONE
Study Groups
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Calorie Label
Labels will read "\[lower calorie bound\] - \[upper calorie bound\] calories per container. 2,000 calories a day is used for general nutrition advice but calorie needs vary."
Label Condition
Labels will be presented in front of drinks. We will vary the messaging presented to the consumer.
Warning Label
Labels will read "WARNING: Drinking beverages with added sugar(s) contributes to obesity, diabetes, and tooth decay."
Label Condition
Labels will be presented in front of drinks. We will vary the messaging presented to the consumer.
Warning Label with Graphics
Labels will read "WARNING: Drinking beverages with added sugar(s) contributes to obesity, diabetes, and tooth decay." These labels will also have graphic depictions of each health condition above the corresponding text.
Label Condition
Labels will be presented in front of drinks. We will vary the messaging presented to the consumer.
No label
We will also have a condition where no labels are presented-- business as usual.
No interventions assigned to this group
Interventions
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Label Condition
Labels will be presented in front of drinks. We will vary the messaging presented to the consumer.
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
ALL
Yes
Sponsors
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Harvard University
OTHER
Responsible Party
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Leslie John
Principal Investigator
Principal Investigators
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Grant E Donnelly, MA
Role: PRINCIPAL_INVESTIGATOR
Harvard University
Laura Y Zatz, MPH
Role: PRINCIPAL_INVESTIGATOR
Harvard School of Public Health (HSPH)
References
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Donnelly GE, Zatz LY, Svirsky D, John LK. The Effect of Graphic Warnings on Sugary-Drink Purchasing. Psychol Sci. 2018 Aug;29(8):1321-1333. doi: 10.1177/0956797618766361. Epub 2018 Jun 18.
Other Identifiers
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IRB16-0222
Identifier Type: -
Identifier Source: org_study_id
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