NCT07555262 Reminder Strategies to Improve Meal-Logging Adherence
| NCT ID | NCT07555262 |
| Status | Recruiting |
| Phase | — |
| Sponsor | University of St.Gallen |
| Condition | Patient Compliance |
| Study Type | INTERVENTIONAL |
| Enrollment | 200 participants |
| Start Date | 2025-12-08 |
| Primary Completion | 2027-01 |
Eligibility & Interventions
Eligibility Fast-Check
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What to Expect as a Participant
You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.
This trial targets 200 participants in total. It began in 2025-12-08 with a primary completion date of 2027-01.
⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.
Brief Summary
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: * 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? * 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? * Do the effects of loss-framed and logging consistency reminders differ from each other? Primary aim: To estimate the proximal effect of each reminder type on whether a participant logs a meal within two hours of receiving a reminder. Secondary 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. The 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. Note: 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.
Eligibility Criteria
Inclusion Criteria: * Citizens or residents of Switzerland who are German-speaking (main place of living or employment in Switzerland). * Age ≥45 years. * BMI ≥25 kg/m² (overweight or obese). * Regular access to a smartphone (iOS or Android) with a data plan. * Able to use smartphone applications. * Able to walk independently. Exclusion Criteria: * History of stroke, heart disease, renal failure, cancer, or diabetes (type 1 or type 2). * Past vascular bypass surgery or angioplasty. * Current or planned use of glucose-lowering medications during the upcoming 4 weeks (e.g., GLP-1 receptor agonists, metformin). * Pregnant or breastfeeding. * Relevant skin conditions at wearable placement sites (e.g., upper arm). * BMI \<25 kg/m² confirmed at enrollment. * FPG ≥7.0 mmol/L and/or HbA1c ≥6.5% (newly identified type 2 diabetes); Individuals who meet type-2 diabetes criteria at enrollment, based on Swiss/ADA 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.
Contact & Investigator
Frequently Asked Questions
Who can join the NCT07555262 clinical trial?
This trial is open to participants of all sexes, aged 45 Years or older, studying Patient Compliance. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.
Is NCT07555262 currently recruiting?
Yes, NCT07555262 is actively recruiting participants. Contact the research team at mia.jovanova@unisg.ch for enrollment information.
Where is the NCT07555262 trial being conducted?
This trial is being conducted at Sankt Gallen, Switzerland.
Who is sponsoring the NCT07555262 clinical trial?
NCT07555262 is sponsored by University of St.Gallen. The trial plans to enroll 200 participants.