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

Not Applicable

Completed

• Conditions: Smoking, Cigarette; Smoking Cessation

• Registration Number: NCT03501472
• Lead Sponsor: Ohio State University

Brief 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.

Detailed Description

Not available

Study Timeline

• Study Start: 2016-04-16
• Primary Completion: 2016-06-02
• Study Completion: 2016-06-02
• Status Verified: 2018-04
• Study First Submitted: 2018-04-10
• Study First Submitted QC: 2018-04-10
• Last Update Submitted: 2018-04-10
• Study First Posted: 2018-04-18
• Last Update Posted: 2018-04-18

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 866

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: FACTORIAL

Primary Outcome Measures

Name	Time	Method
numeric risk recall	immediately following last exposure or after 6-week delay	free recall for numeric risks presented in labels (e.g., ____% of smokers die before age 85), both for smokers and nonsmokers
numeric risk recognition	immediately following last exposure or after 6-week delay	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.

Secondary Outcome Measures

Name	Time	Method
smoking risk perceptions	immediately following last exposure or after 6-week delay	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)
smoking risk knowledge	immediately following last exposure or after 6-week delay	Participants listed as many risks of smoking as they could think of.
quit intentions	immediately following last exposure or after 6-week delay	Participants intentions to quit smoking, Likelihood of smoking within next 30 days, next year (-3 = very unlikely, 3 = very likely)