Impact of Smoking Information on Concerns About Radon

Smoking Clinical Trial

Official title:

Impact of Smoking Information on Concerns About Radon

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03499535
• Other study ID #: 201507727
• Status: Completed
• Phase: N/A
• Start date: August 7, 2015
• Est. completion date: April 22, 2016

Study information

• Verified date: April 2019
• Source: University of Iowa
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Despite a push for tailored messages, health communications are often aimed at, and viewed by, people with varying levels of risk. This project examined—in the context of radon risk messages—whether information relevant to high-risk individuals can have an unintended influence on lower-risk individuals. Specifically, the investigators assessed whether information about lung-cancer risk from smoking reduced concerns about lung-cancer risk from radon among nonsmokers. The investigators hypothesized that non-smokers who read a message that included smoking-relevant information would express less concern about the effects of radon exposure and less interest in testing their home compared to those who read a version in which smoking-relevant information was excluded. Two studies were conducted. Although the investigators did not exclude smokers, the focus was on participants self-identifying as nonsmokers (including never smokers and former smokers).

Description:

Despite a push for tailored messages, health communications are often aimed at, and viewed by, people with varying levels of risk. This project examined—in the context of radon risk messages—whether information relevant to high-risk individuals can have an unintended influence on lower-risk individuals. Specifically, the investigators assessed whether information about lung-cancer risk from smoking reduced concerns about lung-cancer risk from radon among nonsmokers. The investigators hypothesized that non-smokers who read a message that included smoking-relevant information would express less concern about the effects of radon exposure and less interest in testing their home compared to those who read a version in which smoking-relevant information was excluded. Two studies were conducted. Although the investigators did not exclude smokers, the focus was on participants self-identifying as nonsmokers (including never smokers and former smokers). Participants in both studies were recruited through Amazon's Mechanical Turk (MTurk). Participants viewed radon messages that varied in the information they communicated about smoking's effect on lung cancer. In Study 1, smoking information was included or excluded from messages assembled from existing radon pamphlets. In Study 2, versions of a new radon message either excluded smoking information, described smoking as a major cause of lung cancer, or also described smoking's synergistic effect with radon on lung cancer risk. After viewing a radon health message, participants completed a variety of measures. Primary measures assessed respondents' anticipated sense of concern and related reactions if they learned that they/their home had been exposed to elevated levels of radon. Other key measures included questions about participants' interest and intention to test their home for radon.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 1390
• Est. completion date: April 22, 2016
• Est. primary completion date: April 22, 2016
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Live within the US

• Have an Amazon Mechanical Turk account (website where online study was posted)

Exclusion Criteria:

Related Conditions & MeSH terms

• Intention
• Lung Neoplasms
• Radon Exposure
• Risk Reduction Behavior
• Smoking

Intervention

Behavioral:
• Radon & Smoking Synergistic
Participants viewed health information detailing the risks of developing lung cancer from exposure to radon gas, smoking, and their synergistic effects. This intervention represents the type of information most commonly presented in radon risk communications.
• Radon Only
Participants viewed health information detailing the risks of developing lung cancer from radon exposure. No information about the risks for developing lung cancer associated with smoking or its synergistic effect with radon exposure are included.
• Radon and Smoking Isolated
Participants viewed health information detailing the risks of developing lung cancer from radon exposure and smoking. No information describing the synergistic effects of smoking and radon exposure on lung cancer risk are included.
• EPA
Health information modeled after the Environmental Protection Agency's (EPA) pamphlet on radon risk.
• Idaho
Health information modeled after the Idaho Department of Health and Human Welfare's pamphlet on radon risk.

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Paul Windschitl

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Conditional Concern Composite	Composite formed from 4 conditional questions assessing concern, perceived impact on risk and comparative risk, and threat--if exposed to radon	Immediately post-intervention (approx. 1 minute)
Primary	Interest in Testing Composite	Composite formed from 2 questions assessing importance and intention to test home for radon	Immediately post-intervention (approx. 2 minutes)
Secondary	Worry Elicited by Health Message	Single question assessing worry elicited by the health communication material	Immediately post-intervention (approx. 2 minutes)
Secondary	Likelihood Judgments about Lung Cancer	Three items assessing perceived likelihood of developing lung cancer	Immediately post-intervention (approx. 4 minutes)
Secondary	Elect to Leave Email for Raffle	Participants given option to leave email address in case they won one of the 20 radon kits being raffled (Study 2).	Immediately post-intervention (approx. 4 minutes)
Secondary	Elect to Read More	Participants given option to be presented with more information at the end of the session about testing for radon (Study 2).	Immediately post-intervention (approx. 4 minutes)
Secondary	Concern about Loved Ones If Exposed to Radon	Rated how concerned they would be about loved ones if they learned their home had high radon (Study 2)	Immediately post-intervention (approx. 4 minutes)