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Impact of Smoking Information on Concerns About Radon

Impact of Smoking Information on Concerns About Radon

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03499535
Enrollment
1390
Registered
2018-04-17
Start date
2015-08-07
Completion date
2016-04-22
Last updated
2019-04-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

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

Keywords

Risk Perception

Brief 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).

Detailed 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.

Interventions

BEHAVIORALRadon & 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.

BEHAVIORALRadon 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.

BEHAVIORALRadon 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.

BEHAVIORALEPA

Health information modeled after the Environmental Protection Agency's (EPA) pamphlet on radon risk.

BEHAVIORALIdaho

Health information modeled after the Idaho Department of Health and Human Welfare's pamphlet on radon risk.

Sponsors

Paul Windschitl
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
FACTORIAL
Primary purpose
PREVENTION
Masking
SINGLE (Subject)

Masking description

Participants blinded to condition.

Intervention model description

Study 1: Participants randomly assigned to one of two conditions. Study 2: Participants randomly assigned to one of three conditions.

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Live within the US * Have an Amazon Mechanical Turk account (website where online study was posted)

Exclusion criteria

* None

Design outcomes

Primary

MeasureTime frameDescription
Conditional Concern CompositeImmediately post-intervention (approx. 1 minute)Composite formed from 4 conditional questions assessing concern, perceived impact on risk and comparative risk, and threat--if exposed to radon
Interest in Testing CompositeImmediately post-intervention (approx. 2 minutes)Composite formed from 2 questions assessing importance and intention to test home for radon

Secondary

MeasureTime frameDescription
Elect to Leave Email for RaffleImmediately post-intervention (approx. 4 minutes)Participants given option to leave email address in case they won one of the 20 radon kits being raffled (Study 2).
Worry Elicited by Health MessageImmediately post-intervention (approx. 2 minutes)Single question assessing worry elicited by the health communication material
Concern about Loved Ones If Exposed to RadonImmediately post-intervention (approx. 4 minutes)Rated how concerned they would be about loved ones if they learned their home had high radon (Study 2)
Elect to Read MoreImmediately post-intervention (approx. 4 minutes)Participants given option to be presented with more information at the end of the session about testing for radon (Study 2).
Likelihood Judgments about Lung CancerImmediately post-intervention (approx. 4 minutes)Three items assessing perceived likelihood of developing lung cancer

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026