[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"reminder-systems\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:reminder-systems":32},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,2,0,[8,68],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":14,"acronym":4,"eligibilityCriteria":15,"healthyVolunteers":16,"sex":17,"minAge":18,"maxAge":19,"enrollmentInfo":20,"targetDuration":4,"studyType":23,"phases":24,"briefSummary":26,"conditions":27,"keywords":35,"overallStatus":55,"whyStopped":4,"lastUpdateSubmitDate":56,"lastUpdatePostDateStruct":57,"startDateStruct":60,"completionDateStruct":62,"leadSponsor":64,"locationsCount":67},"100641316","randomized-controlled-trial-of-text-message-to-increase-pneumococcal-vaccination-in-adults-in-chile-100641316",false,"NCT07659470","RANDOMIZED CONTROLLED TRIAL OF TEXT MESSAGE TO INCREASE PNEUMOCOCCAL VACCINATION IN ADULTS IN CHILE.","RANDOMIZED CONTROLLED TRIAL OF THE USE OF TEXT MESSAGE REMINDERS TO INCREASE PNEUMOCOCCAL VACCINATION COVERAGE IN ADULTS AGED 65 YEARS IN CHILE.","Inclusion Criteria:\n\n* Adults born during the year 1961, turning 65 years of age in 2026\n* Resident in Chile at the time of the study\n* Valid mobile phone number registered in the National Immunization Registry (RNI)\n\nExclusion Criteria:\n\n* Record of pneumococcal vaccination in the National Immunization Registry (RNI).\n* Identified as deceased in the Chilean Civil Registry and Identification Service.",true,"ALL","64 Years","65 Years",{"count":21,"type":22},43000,"ESTIMATED","INTERVENTIONAL",[25],"NA","The goal of this randomized controlled trial is to learn if text message reminders sent through WhatsApp increase pneumococcal vaccination coverage in adults turning 65 years old in Chile. The main questions it aims to answer are:\n\nDo text message reminders increase the proportion of adults aged 65 years who receive the pneumococcal vaccine compared to usual care? Do text message reminders increase pneumococcal vaccination coverage within the first 7 days after the message is sent? Is there an association between socioeconomic factors and pneumococcal vaccination coverage in adults aged 65 years in Chile?\n\nResearchers will compare adults who receive a text message reminder to adults who receive no reminder (usual care) to see if the reminders increase vaccination uptake.\n\nParticipants will:\n\nBe randomly assigned to receive a WhatsApp text message reminder about the pneumococcal vaccine or to receive no reminder Receive a second reminder on day 14 if they have not yet been vaccinated (intervention group only) Be followed for 6 weeks, with vaccination status checked at days 7, 21, and 42 from the start of the intervention",[28,29,30,31,32,33,34],"Pneumococcal Infections","Immunization Programs","Vaccination Coverage","Text Messaging (Intervention)","Reminder Systems","Health Promotion","Aged 65 Years or Older",[36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54],"Pneumococcal vaccine","Vaccination coverage","Text message reminder","WhatsApp","Older adults","National Immunization Program","Randomized controlled trial","Health behavior nudge","Digital health intervention","Public health","Streptococcus pneumoniae","Behavioral intervention","Vaccine uptake","Low-cost intervention","Population-based intervention","Pneumococcal polysaccharide vaccine","Immunization registry","Latin America","Chile","NOT_YET_RECRUITING","2026-06-15",{"date":58,"type":59},"2026-06-22","ACTUAL",{"date":61,"type":22},"2026-07-15",{"date":63,"type":22},"2026-10-01",{"name":65,"class":66},"Pablo Tomás Valenzuela García","OTHER",1,{"id":69,"slug":70,"hasResults":11,"nctId":71,"briefTitle":72,"officialTitle":72,"acronym":4,"eligibilityCriteria":73,"healthyVolunteers":16,"sex":17,"minAge":74,"maxAge":4,"enrollmentInfo":75,"targetDuration":4,"studyType":23,"phases":77,"briefSummary":78,"conditions":79,"keywords":82,"overallStatus":85,"whyStopped":4,"lastUpdateSubmitDate":86,"lastUpdatePostDateStruct":87,"startDateStruct":89,"completionDateStruct":91,"leadSponsor":93,"locationsCount":67},"100635636","reminder-strategies-to-improve-meal-logging-adherence-100635636","NCT07555262","Reminder Strategies to Improve Meal-Logging Adherence","Inclusion Criteria:\n\n* Citizens or residents of Switzerland who are German-speaking (main place of living or employment in Switzerland).\n* Age ≥45 years.\n* BMI ≥25 kg\u002Fm² (overweight or obese).\n* Regular access to a smartphone (iOS or Android) with a data plan.\n* Able to use smartphone applications.\n* Able to walk independently.\n\nExclusion Criteria:\n\n* History of stroke, heart disease, renal failure, cancer, or diabetes (type 1 or type 2).\n* Past vascular bypass surgery or angioplasty.\n* Current or planned use of glucose-lowering medications during the upcoming 4 weeks (e.g., GLP-1 receptor agonists, metformin).\n* Pregnant or breastfeeding.\n* Relevant skin conditions at wearable placement sites (e.g., upper arm).\n* BMI \\\u003C25 kg\u002Fm² confirmed at enrollment.\n* FPG ≥7.0 mmol\u002FL and\u002For HbA1c ≥6.5% (newly identified type 2 diabetes); Individuals who meet type-2 diabetes criteria at enrollment, based on Swiss\u002FADA diagnostic criteria will be informed of blood test results and referred to a GP. These individuals will be deemed ineligible and excluded from the study.","45 Years",{"count":76,"type":22},200,[25],"This study is a single-center micro-randomized trial, aiming to examine the effects of two theory-driven reminder strategies on adherence to repeated, image-based meal logging in adults age 45 and older. Three times daily, participants are automatically randomized to receive one of three reminder messages prior to each habitual mealtime. The main research questions the trial aims to answer are:\n\n* Do loss-framed reminders (emphasizing loss of a daily financial reward for not logging) increase meal logging adherence in the two hours following a reminder, compared to a neutral reminder?\n* Do logging consistency reminders (providing feedback on recent logging streaks) increase meal logging adherence in the two hours following a reminder, compared to a neutral reminder?\n* Do the effects of loss-framed and logging consistency reminders differ from each other?\n\nPrimary aim: To estimate the proximal effect of each reminder type on whether a participant logs a meal within two hours of receiving a reminder.\n\nSecondary aim: To examine whether within-person physiological patterns (e.g., heart rate variation) moderate response to reminders, with the goal of identifying physiological markers of receptivity to behavioral prompts.\n\nThe trial aims to enroll 200 adults aged 45 and older. Participants attend a baseline visit for onboarding, consent, and device setup, followed by a 28 day remote intervention period during which they should photograph their meals three times daily (breakfast, lunch, dinner) and wear a smartwatch and smart ring continuously. Prior to each mealtime, they receive an automatically randomized reminder message. Participants earn a daily financial reward contingent on completing meal logging for that day.\n\nNote: This trial was registered retrospectively as enrollment began prior to registration. However, registration was completed before data collection was finished and before any data analysis was conducted.",[80,81,32],"Patient Compliance","Mobile Applications",[83,84],"micro-randomized trial","adherence","RECRUITING","2026-04-28",{"date":88,"type":59},"2026-05-05",{"date":90,"type":59},"2025-12-08",{"date":92,"type":22},"2027-01",{"name":94,"class":66},"University of St.Gallen"]