Clinical Research Directory
Browse clinical research sites, groups, and studies.
Nudging Preventive Screening Via Message Framing and Bundling
Sponsor: University of Chile
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").
Official title: The Effect of Message Framing and Screening Bundling on Preventive Screening Engagement: A Randomized Field Experiment
Key Details
Gender
All
Age Range
21 Years - 74 Years
Study Type
INTERVENTIONAL
Enrollment
235000
Start Date
2026-06-08
Completion Date
2026-12-08
Last Updated
2026-06-12
Healthy Volunteers
No
Conditions
Interventions
Basic cancer screening message
Patients receive a WhatsApp message naming their recommended cancer screening exam and describing it as the test recommended for their age group.
Basic chronic disease test message
Patients receive a WhatsApp message naming the recommended chronic disease test and describing it as the test recommended for their age group.
Basic combined message
Patients receive a WhatsApp message naming both the recommended cancer screening and the chronic disease test, and describing them as the tests recommended for their age group.
Risk framing cancer screening message
Patients receive a WhatsApp message naming their recommended cancer screening exam and emphasizing that (1) the recommendation is based on health risks common to their age group and (2) early detection can be life-saving
Risk framing chronic disease test message
Patients receive a WhatsApp message naming the recommended chronic disease test and emphasizing that (1) the recommendation is based on health risks common to their age group and (2) early detection can be life-saving.
Risk framing combined message
Patients receive a WhatsApp message naming both exams and emphasizing that (1) the recommendation is based on health risks common to their age group and (2) early detection can be life-saving.
Peace of mind framing cancer screening message
Patients receive a WhatsApp message naming their recommended cancer screening exam and emphasizing that getting the exam done on time will give them peace of mind about their health.
Peace of mind framing chronic disease test message
Patients receive a WhatsApp message naming the recommended chronic disease and emphasizing that getting the exam done on time will give them peace of mind about their health.
Peace of mind framing combined message
Patients receive a WhatsApp message naming both exams and emphasizing that getting the exams done on time will give them peace of mind about their health.