Impact of Graphic Cigarette Warnings

Study Results

Results pending

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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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

2149 participants

Study Classification

INTERVENTIONAL

Study Start Date

2014-10-31

Study Completion Date

2016-09-30

Brief Summary

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The purpose of this randomized controlled trial is to determine whether graphic health warnings on cigarette packs are more effective than the existing Surgeon General's warning on cigarette packs at encouraging quit attempts. While previous experiments evaluating candidate graphic warnings have been informative, they have used psychological outcomes, such as attitudes or quit intentions, but not actual cessation behavior (e.g., quit attempts). Furthermore, they typically expose participants to warnings in controlled but artificial experimental settings for a short period of time, using much lower frequency and shorter duration of warning exposure than found in the real world. This study addresses these issues by evaluating the impact of warnings on quit attempts by randomly assigning smokers to have their cigarette packs labeled with either a graphic warning or a Surgeon General's warning for four weeks.

Main hypothesis: Smokers randomized to receive graphic warnings on their cigarette packs will be more likely to report a quit attempt in the 4 weeks of the study than smokers randomized to receive a Surgeon General's label on their cigarette packs.

Secondary hypothesis: Smokers randomized to receive graphic warnings on their cigarette packs will have higher quit intentions at 4 weeks than smokers randomized to receive a Surgeon General's label on their cigarette packs, controlling for baseline quit intentions.

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Detailed Description

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The U.S. Food and Drug Administration (FDA) proposed 9 new graphic warnings for cigarette packs in June 2011 to comply with the Family Smoking Prevention and Tobacco Control Act. However, tobacco industry litigation has delayed implementation of graphic warnings. A court ruling that struck down the labels criticized FDA for failing to "present any data - much less the substantial evidence required under the federal law - showing that enacting their proposed graphic warnings will accomplish the agency's stated objective of reducing smoking rates." This study will address this critique head-on by rigorously testing the impact of the graphic warnings on quit attempts in a randomized control trial.

Recruitment: Smokers will first undergo screening online or call the study center to complete the screening questionnaire over the phone. Study staff will schedule eligible smokers for 5 in-person visits. For each of their first 4 visits, smokers will be asked to bring the number of cigarettes they expect to smoke in an 8 day period.

Informed Consent: Prior to consenting smokers, research staff will visually inspect photo identification of smokers who report or appear to be under age 27. At the beginning of the first appointment, study personnel will explain the consent form and ask the smoker to read the form. Once the participant has finished reading the form, the study personnel member will ask the participant if he or she has any questions. Then both parties will sign the consent form and the participant will receive a copy of the consent form.

Randomization: After smokers have consented to participating in the study, study personnel will randomly assign them to a condition. The investigators will determine the randomization order a priori. Smokers have an equal chance of being randomized to receive one of four graphic warnings or one of four Surgeon General's warnings. They will receive the same warning on their packs during the study.

Assessment: Participants will complete 6 computer-based surveys during the study. The first appointment will take around 60 minutes and each subsequent visit will take around 30-45 minutes to complete. At their first visit, they will complete a "baseline pre-test," after which study personnel will show participants one of their cigarette packs with the assigned warning. Participants will be allowed to examine the pack. They will then return the pack to the study personnel and complete a "baseline post-test." At the next 3 appointments, participants will complete only one survey and their packs will be labeled. At the final appointment, they will only complete a survey.

Detailed description of the intervention: While participants are taking the survey, research staff will apply study warning labels to participants' cigarette packs during the first 4 visits. Participants assigned to the graphic warning condition will receive one of four graphic warning labels that will be applied and cover the top half of the front and back of their cigarette packs. The text for the graphic warnings was selected from the 2009 Family Smoking Prevention and Tobacco Control Act and the images were proposed by the FDA. Participants in the Surgeon General's warning condition will receive one of four Surgeon General's Warnings that will be placed on the side of their packs on top of the Surgeon General's warning printed by the manufacturer. This procedure for the control condition is intended to control for the effects of labeling. The investigators will instruct participants in both conditions to use cigarettes from these labeled packs while they are in the study. Each week they will bring in 8 days' of cigarettes (one extra day to provide a buffer in case of rescheduled appointments or smoking more than anticipated) for labeling. Additionally, they will bring in any unused labeled packs from the previous appointment. The investigators will assess how many cigarettes participants smoke from labeled (i.e., study) and unlabeled (i.e., non-study) packs to calculate intervention dose (% of cigarettes smoked from labeled packs). At the end of the study, participants will receive a list of cessation resources. During the final appointment, participants will also report whether they knew anyone else in the study or saw another participant's labels, to assess potential contamination.

Conditions

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Smoking

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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Graphic Warning

Graphic warnings that include text and an image depicting a health effect of smoking will be applied on labels that cover the top half of the front and back of participants' cigarette packs each week for 4 weeks. Within the graphic warning condition, participants will be assigned to receive 1 of 4 warnings for 4 weeks. The text for these warnings was selected from the 2009 Family Smoking Prevention and Tobacco Control Act and the images were proposed by the FDA.

Group Type EXPERIMENTAL

Graphic Warning

Intervention Type OTHER

Participants will be randomly assigned to receive one of the following four graphic warnings on their cigarette packs for 4 weeks:

1. Text: "WARNING: Cigarettes are addictive." Image: Man smoking through tracheotomy hole.
2. Text: "WARNING: Cigarettes causes fatal lung disease." Image: Healthy lungs next to diseased lungs.
3. Text: "WARNING: Cigarettes cause cancer." Image: Mouth with cancerous lesion on lip.
4. Text: "WARNING: Smoking can kill you." Image: Woman dying from cancer.

Surgeon General's Warning

Labels with Surgeon General's Warning text will be applied to the side of participants' cigarette packs each week for 4 weeks, on top of the Surgeon General's Warning printed by the manufacturer.

Group Type ACTIVE_COMPARATOR

Surgeon General's Warning

Intervention Type OTHER

Participants will be randomly assigned to receive warnings with one of the four Surgeon General's Warnings on their cigarette packs for 4 weeks:

1. SURGEON GENERAL'S WARNING: Smoking Causes Lung Cancer, Heart Disease, Emphysema, and May Complicate Pregnancy.
2. SURGEON GENERAL'S WARNING: Quitting Smoking Now Greatly Reduces Serious Risks to Your Health.
3. SURGEON GENERAL'S WARNING: Smoking by Pregnant Women May Result in Fetal Injury, Premature Birth, and Low Birth Weight.
4. SURGEON GENERAL'S WARNING: Cigarette Smoke Contains Carbon Monoxide.

Interventions

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Surgeon General's Warning

Participants will be randomly assigned to receive warnings with one of the four Surgeon General's Warnings on their cigarette packs for 4 weeks:

1. SURGEON GENERAL'S WARNING: Smoking Causes Lung Cancer, Heart Disease, Emphysema, and May Complicate Pregnancy.
2. SURGEON GENERAL'S WARNING: Quitting Smoking Now Greatly Reduces Serious Risks to Your Health.
3. SURGEON GENERAL'S WARNING: Smoking by Pregnant Women May Result in Fetal Injury, Premature Birth, and Low Birth Weight.
4. SURGEON GENERAL'S WARNING: Cigarette Smoke Contains Carbon Monoxide.

Intervention Type OTHER

Graphic Warning

Participants will be randomly assigned to receive one of the following four graphic warnings on their cigarette packs for 4 weeks:

1. Text: "WARNING: Cigarettes are addictive." Image: Man smoking through tracheotomy hole.
2. Text: "WARNING: Cigarettes causes fatal lung disease." Image: Healthy lungs next to diseased lungs.
3. Text: "WARNING: Cigarettes cause cancer." Image: Mouth with cancerous lesion on lip.
4. Text: "WARNING: Smoking can kill you." Image: Woman dying from cancer.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Be 18 years or older
* Have smoked at least 100 cigarettes in his or her lifetime
* Currently smoke cigarettes
* Be able to read and speak English

Exclusion Criteria

* Pregnant women
* Smokers who smoke exclusively roll-your-own cigarettes
* Smokers concurrently enrolled in another cessation study
* Smokers who smoke fewer than 7 cigarettes per week, on average
* Smokers who live in the same household as someone who has enrolled in the study

Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes