Nudging Preventive Screening Via Message Framing and Bundling
Starting soon · Not applicable
Conditions studied: Breast Neoplasms, Uterine Cervical Neoplasms, Colorectal Neoplasms, Prostatic Neoplasms, Diabetes Mellitus, Dyslipidemias
In brief
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").
Key facts
- Study ID
- NCT07644910
- Run by
- University of Chile
- People needed
- 235000
- Starts
- 2026-06-08
- Expected to finish
- 2026-12-08
- Last updated by the study team
- 2026-06-17
Who can join
Age: 21 and older, up to 74. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- 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)
You may not qualify if…
- Participants whose WhatsApp message was not successfully delivered, as reported by the third-party software used by the medical institution.
Full record on ClinicalTrials.gov
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