Trial Outcomes & Findings for Promoting Radon Testing Via Smartphone App: A Clinical Trial in a High Radon State (NCT NCT04980521)
NCT ID: NCT04980521
Last Updated: 2024-08-09
Results Overview
The rate at which participants order a free radon test kit
Recruitment status
COMPLETED
Study phase
NA
Target enrollment
138 participants
Primary outcome timeframe
Through the study completion - 3 months
Results posted on
2024-08-09
Participant Flow
Some participants did not meet the eligibility criteria. They enrolled the study, but before random assignment began, they were directed to the end of the study due to not being eligible.
Participant milestones
| Measure |
Print Brochures
Participants assigned to the print brochure group will receive three educational print brochures about radon published by EPA via postal mails for three months (one per each month).
Print brochure: Participants will receive print brochures.
|
The Radon App
Participants assigned to the radon app group will be asked to use the radon app for three months where they will be exposed to mobile friendly educational content that is created from educational print brochures about radon published by EPA.
The radon app: Participants will be asked to use the radon app.
|
|---|---|---|
|
Overall Study
STARTED
|
68
|
70
|
|
Overall Study
COMPLETED
|
50
|
57
|
|
Overall Study
NOT COMPLETED
|
18
|
13
|
Reasons for withdrawal
Withdrawal data not reported
Baseline Characteristics
One participant in the radon app group didn't provide sex/gender information. One participant in the brochure group also didn't provide sex/gender information.
Baseline characteristics by cohort
| Measure |
Print Brochures
n=68 Participants
Participants assigned to the print brochure group will receive three educational print brochures about radon published by EPA via postal mails for three months (one per each month).
Print brochure: Participants will receive print brochures.
|
The Radon App
n=70 Participants
Participants assigned to the radon app group will be asked to use the radon app for three months where they will be exposed to mobile friendly educational content that is created from educational print brochures about radon published by EPA.
The radon app: Participants will be asked to use the radon app.
|
Total
n=138 Participants
Total of all reporting groups
|
|---|---|---|---|
|
Age, Categorical
<=18 years
|
16 Participants
n=68 Participants
|
24 Participants
n=70 Participants
|
40 Participants
n=138 Participants
|
|
Age, Categorical
Between 18 and 65 years
|
52 Participants
n=68 Participants
|
46 Participants
n=70 Participants
|
98 Participants
n=138 Participants
|
|
Age, Categorical
>=65 years
|
0 Participants
n=68 Participants
|
0 Participants
n=70 Participants
|
0 Participants
n=138 Participants
|
|
Sex: Female, Male
Female
|
43 Participants
n=67 Participants • One participant in the radon app group didn't provide sex/gender information. One participant in the brochure group also didn't provide sex/gender information.
|
44 Participants
n=69 Participants • One participant in the radon app group didn't provide sex/gender information. One participant in the brochure group also didn't provide sex/gender information.
|
87 Participants
n=136 Participants • One participant in the radon app group didn't provide sex/gender information. One participant in the brochure group also didn't provide sex/gender information.
|
|
Sex: Female, Male
Male
|
24 Participants
n=67 Participants • One participant in the radon app group didn't provide sex/gender information. One participant in the brochure group also didn't provide sex/gender information.
|
25 Participants
n=69 Participants • One participant in the radon app group didn't provide sex/gender information. One participant in the brochure group also didn't provide sex/gender information.
|
49 Participants
n=136 Participants • One participant in the radon app group didn't provide sex/gender information. One participant in the brochure group also didn't provide sex/gender information.
|
|
Race (NIH/OMB)
American Indian or Alaska Native
|
2 Participants
n=68 Participants
|
1 Participants
n=70 Participants
|
3 Participants
n=138 Participants
|
|
Race (NIH/OMB)
Asian
|
3 Participants
n=68 Participants
|
5 Participants
n=70 Participants
|
8 Participants
n=138 Participants
|
|
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
|
0 Participants
n=68 Participants
|
0 Participants
n=70 Participants
|
0 Participants
n=138 Participants
|
|
Race (NIH/OMB)
Black or African American
|
2 Participants
n=68 Participants
|
1 Participants
n=70 Participants
|
3 Participants
n=138 Participants
|
|
Race (NIH/OMB)
White
|
57 Participants
n=68 Participants
|
58 Participants
n=70 Participants
|
115 Participants
n=138 Participants
|
|
Race (NIH/OMB)
More than one race
|
2 Participants
n=68 Participants
|
3 Participants
n=70 Participants
|
5 Participants
n=138 Participants
|
|
Race (NIH/OMB)
Unknown or Not Reported
|
2 Participants
n=68 Participants
|
2 Participants
n=70 Participants
|
4 Participants
n=138 Participants
|
|
Region of Enrollment
United States
|
68 participants
n=68 Participants
|
70 participants
n=70 Participants
|
138 participants
n=138 Participants
|
|
Radon testing history
|
18 Participants
n=68 Participants
|
13 Participants
n=70 Participants
|
31 Participants
n=138 Participants
|
PRIMARY outcome
Timeframe: Through the study completion - 3 monthsThe rate at which participants order a free radon test kit
Outcome measures
| Measure |
Print Brochures
n=68 Participants
Participants assigned to the print brochure group will receive three educational print brochures about radon published by EPA via postal mails for three months (one per each month).
Print brochure: Participants will receive print brochures.
|
The Radon App
n=70 Participants
Participants assigned to the radon app group will be asked to use the radon app for three months where they will be exposed to mobile friendly educational content that is created from educational print brochures about radon published by EPA.
The radon app: Participants will be asked to use the radon app.
|
|---|---|---|
|
Ordering a Free Radon Test Kit
|
9 Participants
|
29 Participants
|
PRIMARY outcome
Timeframe: Through the study completion - 3 monthsThe rate at which participants use the radon test kit to test their houses
Outcome measures
| Measure |
Print Brochures
n=9 Participants
Participants assigned to the print brochure group will receive three educational print brochures about radon published by EPA via postal mails for three months (one per each month).
Print brochure: Participants will receive print brochures.
|
The Radon App
n=29 Participants
Participants assigned to the radon app group will be asked to use the radon app for three months where they will be exposed to mobile friendly educational content that is created from educational print brochures about radon published by EPA.
The radon app: Participants will be asked to use the radon app.
|
|---|---|---|
|
Using the Radon Test Kit
|
2 Participants
|
2 Participants
|
SECONDARY outcome
Timeframe: Change from baseline knowledge level to the completion of study at 3 monthsRadon knowledge was measured by the number of accurate responses to 20 True-False statements in T1 (baseline) and T2 (at 3 months), as used in Kim, Brewster, and Schwartz (2020) (PMID: 32321499). The response options were: "true," "false," and "I don't know." Participants' responses to each statement were then re-coded to 1 ("correct") or 0 ("incorrect" or "I don't know"). After that, two radon knowledge index variables (continuous) were created by summing participants' responses to each statement in T1 (baseline) and T2 (at 3 months). Thus, two radon knowledge scores can range from 0-20 with higher scores indicating better knowledge.
Outcome measures
| Measure |
Print Brochures
n=50 Participants
Participants assigned to the print brochure group will receive three educational print brochures about radon published by EPA via postal mails for three months (one per each month).
Print brochure: Participants will receive print brochures.
|
The Radon App
n=57 Participants
Participants assigned to the radon app group will be asked to use the radon app for three months where they will be exposed to mobile friendly educational content that is created from educational print brochures about radon published by EPA.
The radon app: Participants will be asked to use the radon app.
|
|---|---|---|
|
Change From Baseline Radon Knowledge at 3 Months
|
-0.4 units on a scale
Standard Deviation 1.3
|
2.2 units on a scale
Standard Deviation 1.2
|
Adverse Events
Print Brochures
Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths
The Radon App
Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths
Serious adverse events
Adverse event data not reported
Other adverse events
Adverse event data not reported
Additional Information
Results disclosure agreements
- Principal investigator is a sponsor employee
- Publication restrictions are in place