NCT05833334

Brief Summary

This study is about home air radon testing and has two phases. The goal of the first phase is to learn about renters' and homeowners' views and plans related to radon testing. The main question this phase aims to answer is: 1\. Does taking part in a focus group with information about radon testing change people's plans to test for radon? Participants in the first study phase will:

  • Take a survey about their views on and plans for radon testing.
  • Take part in a focus group discussion about radon testing, during which they will receive information about radon testing.
  • Right after the focus group, take a survey about their plans for radon testing. The second phase is a pilot interventional study. The goal is to test interventions about radon testing with renters and homeowners who smoke and do not smoke. The main questions this phase aims to answer are:
  • Does the recruitment strategy result in enough participants enrolling within 3 months?
  • Will at least 80% of participants complete data collection activities?
  • Will more participants who view an online intervention developed by the researchers request free radon test kits, set them up in their homes, and complete radon testing, compared to participants who view a standard public health infographic? And will even more participants who receive reminder messages, in addition to the online intervention, request free radon test kits, set them up in their homes, and complete radon testing?
  • Take a survey about their views on and plans for radon testing.
  • View an intervention about radon testing.
  • Right after viewing the intervention, take a survey about their views on and plans for radon testing.
  • 2 months later, take a survey about what, if any, steps they've taken to test their homes for radon.
  • Provide the researchers permission to collect data from their State Radon Program on: a) whether they requested a free radon test kit and b) whether testing was completed. Some participants will receive reminder messages for 2 months after viewing the intervention. Researchers will compare an online intervention they developed about radon testing to: a) a standard public health infographic and b) their online intervention combined with reminder messages about radon testing. They will compare the interventions by proportion of participants who: a) request a free radon test kit from their State Radon Programs, b) set-up the radon test kit in their homes, and c) complete radon testing.

Trial Health

77
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
172

participants targeted

Target at P75+ for not_applicable

Timeline
16mo left

Started Jun 2023

Longer than P75 for not_applicable

Geographic Reach
1 country

1 active site

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress69%
Jun 2023Aug 2027

First Submitted

Initial submission to the registry

April 17, 2023

Completed
10 days until next milestone

First Posted

Study publicly available on registry

April 27, 2023

Completed
1 month until next milestone

Study Start

First participant enrolled

June 1, 2023

Completed
4.2 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

August 24, 2027

Expected
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

August 24, 2027

Last Updated

January 30, 2026

Status Verified

January 1, 2026

Enrollment Period

4.2 years

First QC Date

April 17, 2023

Last Update Submit

January 28, 2026

Conditions

Home Air Radon TestingLung Cancer

Keywords

Radon testingBehavior changeSmokingAir quality

Outcome Measures

Primary Outcomes (7)

  • Number of participants enrolled in the study (AIM 3)

    Number of participants who consent into the study and meet eligibility criteria within 3 months of study opening to enrollment.

    3 months

  • Proportion of study participants who complete all study surveys (AIM 3)

    Proportion of study participants who complete all study-related surveys, including the pre-intervention survey, post-intervention survey, and follow-up survey at 2 months post-intervention.

    2 months

  • Proportion of participants who request a home radon test kit at 18 months (AIM 3)

    Proportion of participants, by study arm, who request a free home radon test kit from the New Hampshire Radon Program or Vermont Radon Program in the 18 months following the intervention, the New Hampshire Radon Program or Vermont Radon Program, as reported by the state radon programs; radon test kits are attributed to participants if the state radon program records match the participant's name and/or address of home residence.

    18 months

  • Proportion of participants who request a home radon test kit at 2 months (AIM 3)

    Proportion of participants, by study arm, who request a free home radon test kit from the New Hampshire Radon Program or Vermont Radon Program in the 18 months following the intervention, the New Hampshire Radon Program or Vermont Radon Program, as reported by the state radon programs; radon test kits are attributed to participants if the state radon program records match the participant's name and/or address of home residence.

    2 months

  • Proportion of participants who set-up a home radon test kit in their home (AIM 3)

    Proportion of participants, by study arm, who report setting up the a home radon test kit in their home at two months post-intervention.

    2 months

  • Proportion of participants who complete home radon testing at 18 months (AIM 3)

    Proportion of participants, by study arm who either: a) report completing radon testing via the follow-up survey at two months post-intervention, or b) submit a home radon test kit for analysis through the New Hampshire Radon Program or Vermont Radon Program, as reported by the state radon programs; radon test kits are attributed to participants if the state radon program records match the participant's name and/or address of home residence.

    18 months

  • Proportion of participants who complete home radon testing at 2 months (AIM 3)

    Proportion of participants, by study arm who either: a) report completing radon testing via the follow-up survey at two months post-intervention, or b) submit a home radon test kit for analysis through the New Hampshire Radon Program or Vermont Radon Program, as reported by the state radon programs; radon test kits are attributed to participants if the state radon program records match the participant's name and/or address of home residence.

    2 months

Secondary Outcomes (1)

  • Change in participants' intentions to test the air in their homes for radon in the next 12 months (AIM 1)

    Baseline (pre-test, approximately 1-4 weeks before intervention), immediately after the intervention (post-test)

Study Arms (4)

Public health infographic (AIM 3)

ACTIVE COMPARATOR

Participants will view a standard public health infographic about home air radon testing and will receive information about requesting a free home air radon test kit from their state radon program.

Behavioral: Public health infographic (AIM 3)

Online health promotion intervention tailored by smoking status (AIM 3)

EXPERIMENTAL

Participants will view an online health promotion intervention about home air radon testing, with messaging tailored based on whether the participant smokes or does not smoke. Participants will also receive information about requesting a free home air radon test kit from their state radon program.

Behavioral: Online health promotion intervention tailored by smoking status (AIM 3)

Online health promotion intervention tailored by smoking status, plus reminder messages (AIM 3)

EXPERIMENTAL

Participants will view an online health promotion intervention about home air radon testing, with messaging tailored based on whether the participant smokes or does not smoke. Participants will also receive information about requesting a free home air radon test kit from their state radon program, as well as reminder messages about radon testing for about two months after initially viewing the online intervention component.

Behavioral: Online health promotion intervention tailored by smoking status, plus reminder messages (AIM 3)

Focus group with educational overview (AIM 1)

EXPERIMENTAL

Participants will participate in a focus group discussion about radon testing and will receive a brief educational overview about radon testing.

Behavioral: Focus group with educational overview (AIM 1)

Interventions

Focus group with educational overview (AIM 1)BEHAVIORAL

90-minute online focus group discussion about home air radon testing, plus an educational overview about home air radon testing using a standard public health infographic

Focus group with educational overview (AIM 1)
Public health infographic (AIM 3)BEHAVIORAL

Standard public health infographic about home air radon testing, plus information about requesting a free home air radon test kit

Public health infographic (AIM 3)
Online health promotion intervention tailored by smoking status (AIM 3)BEHAVIORAL

Online health promotion intervention with messaging about home air radon testing tailored by the participant's stated smoking status, plus information about requesting a free home air radon test kit

Online health promotion intervention tailored by smoking status (AIM 3)
Online health promotion intervention tailored by smoking status, plus reminder messages (AIM 3)BEHAVIORAL

Online health promotion intervention with messaging about home air radon testing tailored by the participant's stated smoking status, plus information about requesting a free home air radon test kit, plus reminder messages about home air radon testing sent over two months

Online health promotion intervention tailored by smoking status, plus reminder messages (AIM 3)

Eligibility Criteria

Age18 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Be at least 18 years old
  • Have a valid mailing address in New Hampshire or Vermont,
  • Have not tested their current homes for radon,
  • Rent or own their home, and
  • Live at their home year-round

You may not qualify if:

  • N/A

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Dartmouth Cancer Center

Lebanon, New Hampshire, 03756, United States

RECRUITING

MeSH Terms

Conditions

Lung NeoplasmsSmoking

Interventions

Focus Groups

Condition Hierarchy (Ancestors)

Respiratory Tract NeoplasmsThoracic NeoplasmsNeoplasms by SiteNeoplasmsLung DiseasesRespiratory Tract DiseasesBehavior

Intervention Hierarchy (Ancestors)

Data CollectionEpidemiologic MethodsInvestigative TechniquesHealth Care Evaluation MechanismsQuality of Health CareHealth Care Quality, Access, and EvaluationPublic HealthEnvironment and Public Health

Study Officials

  • Judith R Rees, BM, BCh, PhD

    Dartmouth-Hitchcock Medical Center

    PRINCIPAL INVESTIGATOR

  • Rian M Hasson, MD, MPH

    Dartmouth-Hitchcock Medical Center

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Stephanie Papas, MPH

CONTACT

603-646-5824Stephanie.Papas@dartmouth.edu

Lisa A Purvis, EdD, MPH

CONTACT

603-650-5799Lisa.A.Purvis@dartmouth.edu

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
NONE
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Associate Professor, Epidemiology; Associate Professor, Community & Family Medicine; Associate Director, Community Outreach and Engagement, Dartmouth Cancer Center

Study Record Dates

First Submitted

April 17, 2023

First Posted

April 27, 2023

Study Start

June 1, 2023

Primary Completion (Estimated)

August 24, 2027

Study Completion (Estimated)

August 24, 2027

Last Updated

January 30, 2026

Record last verified: 2026-01

Data Sharing

IPD Sharing
Will not share

Locations

US(1)