[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100635636":3},{"organization":4,"armGroups":7,"interventions":25,"overallOfficials":30,"centralContacts":38,"locations":44,"responsibleParty":67,"collaborators":30,"id":69,"slug":70,"hasResults":71,"nctId":72,"briefTitle":73,"officialTitle":73,"acronym":30,"eligibilityCriteria":74,"healthyVolunteers":75,"sex":76,"minAge":77,"maxAge":30,"enrollmentInfo":78,"targetDuration":30,"studyType":81,"phases":82,"briefSummary":84,"conditions":85,"keywords":89,"overallStatus":47,"whyStopped":30,"lastUpdateSubmitDate":92,"lastUpdatePostDateStruct":93,"startDateStruct":96,"completionDateStruct":98,"leadSponsor":100,"locationsCount":101},{"fullName":5,"class":6},"University of St.Gallen","OTHER",[8,14,19],{"label":9,"type":10,"description":11,"interventionNames":12},"Loss-Framed Reminder","EXPERIMENTAL","A push notification emphasizing the loss of a daily financial reward for not logging the upcoming meal. Assigned with 1\u002F3 probability at each decision point.",[13],"Behavioral: Loss-Framed Reminder",{"label":15,"type":10,"description":16,"interventionNames":17},"Logging Consistency Reminder","A push notification providing feedback on the participant's recent meal logging streak. Assigned with 1\u002F3 probability at each decision point.",[18],"Behavioral: Logging Consistency Reminder",{"label":20,"type":21,"description":22,"interventionNames":23},"Neutral Reminder (Active Control)","ACTIVE_COMPARATOR","A push notification reminding the participant to log a meal without loss-framing or consistency feedback. Serves as the reference condition against which the two experimental reminders are compared. Assigned with 1\u002F3 probability at each decision point.",[24],"Behavioral: Neutral Reminder",[26,31,34],{"type":27,"name":9,"description":28,"armGroupLabels":29,"otherNames":30},"BEHAVIORAL","Push notification emphasizing loss of daily financial reward for not logging the upcoming meal.",[9],null,{"type":27,"name":15,"description":32,"armGroupLabels":33,"otherNames":30},"Push notification providing feedback on recent meal logging streak.",[15],{"type":27,"name":35,"description":36,"armGroupLabels":37,"otherNames":30},"Neutral Reminder","Push notification reminding participants to log a meal.",[20],[39],{"name":40,"role":41,"phone":42,"phoneExt":30,"email":43},"Mia Jovanova, Dr.","CONTACT","+41 44 632 05 41","mia.jovanova@unisg.ch",[45],{"facility":46,"status":47,"city":48,"state":49,"zip":50,"country":51,"countryCode":52,"cosmosGeoPoint":53,"geoPoint":58,"contacts":59},"HOCH Health and School of Medicine, University of St. Gallen","RECRUITING","Sankt Gallen","Canton of St. Gallen","9000","Switzerland","CH",{"type":54,"coordinates":55},"Point",[56,57],9.37477,47.42391,{"lat":57,"lon":56},[60,61,64,65],{"name":40,"role":41,"phone":42,"phoneExt":30,"email":43},{"name":62,"role":63,"phone":30,"phoneExt":30,"email":30},"Tobias Kowatsch, Prof.Dr.","PRINCIPAL_INVESTIGATOR",{"name":40,"role":63,"phone":30,"phoneExt":30,"email":30},{"name":66,"role":63,"phone":30,"phoneExt":30,"email":30},"Michael Brändle, Prof.Dr.med",{"type":68,"investigatorFullName":30,"investigatorTitle":30,"investigatorAffiliation":30,"oldNameTitle":30,"oldOrganization":30},"SPONSOR","100635636","reminder-strategies-to-improve-meal-logging-adherence-100635636",false,"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.",true,"ALL","45 Years",{"count":79,"type":80},200,"ESTIMATED","INTERVENTIONAL",[83],"NA","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.",[86,87,88],"Patient Compliance","Mobile Applications","Reminder Systems",[90,91],"micro-randomized trial","adherence","2026-04-28",{"date":94,"type":95},"2026-05-05","ACTUAL",{"date":97,"type":95},"2025-12-08",{"date":99,"type":80},"2027-01",{"name":5,"class":6},1]