Nudging Preventive Screening Via Message Framing and Bundling (NCT07644910) | Clinical Trial Compass
Not Yet RecruitingNot Applicable
Nudging Preventive Screening Via Message Framing and Bundling
235,000 participantsStarted 2026-06-08
Plain-language summary
This study is a randomized controlled field experiment embedded in the medical institution Early Diagnosis Program in Chile. Participants with two exams pending (a cancer screening test and a chronic disease test for diabetes and dyslipidemia) will be randomly assigned across a 3 × 3 factorial design: three message framing conditions (Basic, Risk/Importance, Peace of Mind) crossed with three exam-type conditions (cancer screening only, chronic disease test only, or both exams). Participants with only a cancer screening pending will be assigned to the 3 framing conditions and be encouraged to get the cancer screening.
In both cases, participants are assigned to each experimental arm at twice the rate of an additional arm receiving the standard message currently used by the medical institution. This standard-message arm is included for operational purposes, is not part of the pre-specified analyses, and is thus not described in the "Arms and Intervention" section (or counted for "number of arms").
Who can participate
Age range
21 Years – 74 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Has at least one pending cancer screening (breast, colorectal, cervical, or prostate) within the contact window, as determined by the medical institution
* Aged 21 to 74 years
* Has a valid phone number on file
* Eligibility is determined operationally before randomization (ex-ante)
Exclusion Criteria:
* Participants whose WhatsApp message was not successfully delivered, as reported by the third-party software used by the medical institution.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1This trial is testing whether different ways of wording or grouping health messages can nudge people to book cancer or chronic disease screenings — since it's not yet recruiting, how would I find out when and where I could actually sign up to participate?
2The study covers screenings for breast, cervical, colorectal, and prostate cancers, as well as diabetes and cholesterol — given my specific health history, which of these screenings would my doctor recommend I prioritize right now, regardless of whether I join this trial?
3Since this is a behavioral study testing message framing rather than a new drug or procedure, are there any meaningful risks to me personally, or is the main consideration just the time and attention involved?
4The trial bundles preventive screenings together as part of its approach — if I were to take part, could that affect the timing or sequencing of screenings my doctor was already planning for me?
5If I don't join this study, is there any concern that I might be falling behind on any of the screenings it covers, and what is my doctor's current recommendation for getting those done?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Screening Engagement Response
Timeframe: 7 days after message delivery
2
Cancer Screening Appointment
Timeframe: 7 days after message delivery
3
Chronic Disease Testing Appointment
Timeframe: 7 days after message delivery
Trial details
NCT IDNCT07644910
SponsorUniversity of Chile
Sponsor typeOTHER
Study typeINTERVENTIONAL
Primary completion2026-09-08
Contact for this trial
Daniel Schwartz Associate Professor, Department of Industrial Engineering, Ph.D. Behavioral Decision