Pictorial Warning Labels, Numeracy, and Memory for Numeric Cigarette Health-risk Information Over Time

Smoking Cessation Clinical Trial

Official title:

Pictorial Warning Labels, Numeracy, and Memory for Numeric Cigarette Health-risk Information Over Time

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03501472
• Other study ID #: P50CA180908A2b
• Secondary ID: P50CA180908
• Status: Completed
• Phase: N/A
• First received: April 10, 2018
• Last updated: April 10, 2018
• Start date: April 16, 2016
• Est. completion date: June 2, 2016

Study information

• Verified date: April 2018
• Source: Ohio State University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Pictorial cigarette warning labels (PWLs) are thought to increase risk knowledge, but experimental research has not examined PWLs' longer term effects on memory for health risks, or for numeric risks (e.g., percentage risk for developing lung cancer). This trial tests memory for numeric health risks immediately or after a six-week delay for US adult smokers. In addition, the trial tests the effects of different warning label components (e.g., whether the numeric risks are percentage or frequency), participants' level of numeric ability, and the consequences of memory for numeric risks on participant risk perceptions and quit intentions.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 866
• Est. completion date: June 2, 2016
• Est. primary completion date: June 2, 2016
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• at least 18 years old

• have smoked 100+ lifetime cigarettes

• currently smoke "every day" or "some days."

• US resident

Exclusion Criteria:

• have not ever smoked a cigarette

Related Conditions & MeSH terms

• Smoking Cessation
• Smoking, Cigarette

Intervention

Behavioral:
• text-only PWL

• low-emot PWL

• high-emot PWL

• immed posttest

• delay posttest

Locations

Country	Name	City	State
n/a

Sponsors (2)

Lead Sponsor	Collaborator
Ohio State University	University of Pennsylvania

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	numeric risk recall	free recall for numeric risks presented in labels (e.g., ____% of smokers die before age 85), both for smokers and nonsmokers	immediately following last exposure or after 6-week delay
Primary	numeric risk recognition	Participants answered one multiple choice question about the numeric risk for smokers and nonsmokers (combined in one question) for each of the 8 outcomes that had been paired with the PWLs. For each question, there were four decoy responses.	immediately following last exposure or after 6-week delay
Secondary	smoking risk perceptions	Participants completed several scale items about how much risk they perceived smoking posed to them (e.g., "Compared to the average nonsmoker your age, gender, and race, how would you rate your chances of": 1) "getting a life threatening illness because of smoking," 2) "getting lung cancer," and 3) "dying at a younger age than average" (-3 = Much lower, +3 = Much higher)); They also gave verbal likelihood ratings for each of the 8 outcomes of smoking that had been paired with the labels (e.g., "Thinking of risks that you were shown in the warnings, what is the likelihood of a smoker [non-smoker] dying from heart disease?," 0=impossible, 11=certain)	immediately following last exposure or after 6-week delay
Secondary	smoking risk knowledge	Participants listed as many risks of smoking as they could think of.	immediately following last exposure or after 6-week delay
Secondary	quit intentions	Participants intentions to quit smoking, Likelihood of smoking within next 30 days, next year (-3 = very unlikely, 3 = very likely)	immediately following last exposure or after 6-week delay