[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100641936":3},{"organization":4,"armGroups":7,"interventions":55,"overallOfficials":60,"centralContacts":85,"locations":60,"responsibleParty":91,"collaborators":60,"id":95,"slug":96,"hasResults":97,"nctId":98,"briefTitle":99,"officialTitle":100,"acronym":60,"eligibilityCriteria":101,"healthyVolunteers":97,"sex":102,"minAge":103,"maxAge":104,"enrollmentInfo":105,"targetDuration":60,"studyType":108,"phases":109,"briefSummary":111,"conditions":112,"keywords":119,"overallStatus":128,"whyStopped":60,"lastUpdateSubmitDate":129,"lastUpdatePostDateStruct":130,"startDateStruct":133,"completionDateStruct":135,"leadSponsor":137,"locationsCount":60},{"fullName":5,"class":6},"University of Chile","OTHER",[8,14,19,24,30,35,40,45,50],{"label":9,"type":10,"description":11,"interventionNames":12},"Basic\u002FControl × Cancer","ACTIVE_COMPARATOR","Basic cancer screening message",[13],"Behavioral: Basic cancer screening message",{"label":15,"type":10,"description":16,"interventionNames":17},"Basic\u002FControl × chronic disease test","Basic chronic disease test message",[18],"Behavioral: Basic chronic disease test message",{"label":20,"type":10,"description":21,"interventionNames":22},"Basic\u002FControl × Both","Basic combined message",[23],"Behavioral: Basic combined message",{"label":25,"type":26,"description":27,"interventionNames":28},"Risk\u002FImportance × Cancer","EXPERIMENTAL","Risk framing cancer screening message",[29],"Behavioral: Risk framing cancer screening message",{"label":31,"type":26,"description":32,"interventionNames":33},"Risk\u002FImportance × Chronic Disease Test","Risk framing chronic disease test message",[34],"Behavioral: Risk framing chronic disease test message",{"label":36,"type":26,"description":37,"interventionNames":38},"Risk\u002FImportance × Both","Risk framing combined message",[39],"Behavioral: Risk framing combined message",{"label":41,"type":26,"description":42,"interventionNames":43},"Peace of Mind × Cancer screening","Peace of mind framing cancer screening message",[44],"Behavioral: Peace of mind framing cancer screening message",{"label":46,"type":26,"description":47,"interventionNames":48},"Peace of Mind × chronic disease Test","Peace of mind framing chronic disease test message",[49],"Behavioral: Peace of mind framing chronic disease test message",{"label":51,"type":26,"description":52,"interventionNames":53},"Peace of Mind × Both","Peace of mind framing combined message",[54],"Behavioral: Peace of mind framing combined message",[56,61,64,67,70,73,76,79,82],{"type":57,"name":11,"description":58,"armGroupLabels":59,"otherNames":60},"BEHAVIORAL","Patients receive a WhatsApp message naming their recommended cancer screening exam and describing it as the test recommended for their age group.",[9],null,{"type":57,"name":16,"description":62,"armGroupLabels":63,"otherNames":60},"Patients receive a WhatsApp message naming the recommended chronic disease test and describing it as the test recommended for their age group.",[15],{"type":57,"name":21,"description":65,"armGroupLabels":66,"otherNames":60},"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.",[20],{"type":57,"name":27,"description":68,"armGroupLabels":69,"otherNames":60},"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",[25],{"type":57,"name":32,"description":71,"armGroupLabels":72,"otherNames":60},"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.",[31],{"type":57,"name":37,"description":74,"armGroupLabels":75,"otherNames":60},"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.",[36],{"type":57,"name":42,"description":77,"armGroupLabels":78,"otherNames":60},"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.",[41],{"type":57,"name":47,"description":80,"armGroupLabels":81,"otherNames":60},"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.",[46],{"type":57,"name":52,"description":83,"armGroupLabels":84,"otherNames":60},"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.",[51],[86],{"name":87,"role":88,"phone":89,"phoneExt":60,"email":90},"Daniel Schwartz Associate Professor, Department of Industrial Engineering, Ph.D. Behavioral Decision","CONTACT","+56979984165","daschwar@dii.uchile.cl",{"type":92,"investigatorFullName":93,"investigatorTitle":94,"investigatorAffiliation":5,"oldNameTitle":60,"oldOrganization":60},"PRINCIPAL_INVESTIGATOR","Daniel Schwartz","Associate Professor, Department of Industrial Engineering","100641936","nudging-preventive-screening-via-message-framing-and-bundling-100641936",false,"NCT07644910","Nudging Preventive Screening Via Message Framing and Bundling","The Effect of Message Framing and Screening Bundling on Preventive Screening Engagement: A Randomized Field Experiment","Inclusion Criteria:\n\n* Has at least one pending cancer screening (breast, colorectal, cervical, or prostate) within the contact window, as determined by the medical institution\n* Aged 21 to 74 years\n* Has a valid phone number on file\n* Eligibility is determined operationally before randomization (ex-ante)\n\nExclusion Criteria:\n\n* Participants whose WhatsApp message was not successfully delivered, as reported by the third-party software used by the medical institution.","ALL","21 Years","74 Years",{"count":106,"type":107},235000,"ESTIMATED","INTERVENTIONAL",[110],"NA","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\u002FImportance, 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.\n\nIn 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\").",[113,114,115,116,117,118],"Breast Neoplasms","Uterine Cervical Neoplasms","Colorectal Neoplasms","Prostatic Neoplasms","Diabetes Mellitus","Dyslipidemias",[120,121,122,123,124,125,126,127],"Behavioral science","randomized controlled trial","WhatsApp patient outreach","message framing","information avoidance","cancer screening","chronic disease testing","preventive care","NOT_YET_RECRUITING","2026-06-15",{"date":131,"type":132},"2026-06-17","ACTUAL",{"date":134,"type":107},"2026-06-08",{"date":136,"type":107},"2026-12-08",{"name":5,"class":6}]