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Spark: Find den optimale sporingsstrategi for vægttab i en digital sundhedsintervention

30. oktober 2026 opdateret af: Michele Patel, Stanford University

Optimering af selvovervågning i en digital sundhedsintervention til vægttab

This optimization trial will examine three tracking (or "self-monitoring") strategies for weight loss -- tracking dietary intake, steps, and/or body weight -- all delivered through digital health tools. The purpose of the study is to evaluate the combination of these strategies that maximizes 6-month weight loss in the context of a standalone digital health intervention for adults with overweight or obesity.

The investigators will recruit 176 total participants to the trial. Recruitment will occur through remote channels. Interested individuals will be directed to an online screening questionnaire; those who are eligible will then be invited to attend an initial remote session with study personnel to ensure interest and eligibility in the study. The weight loss intervention will last 6 months, and all participants will receive a "core" treatment consisting of goal setting, behavioral lessons, action plans, and tailored feedback - all of which will be delivered remotely. Depending on which group participants are assigned to in the study, some individuals will be asked to track their dietary intake, their steps, and/or their body weight via digital tools. All study tasks will occur remotely, thus, participants never need to come in-person for any intervention or assessment tasks.

The investigators will use the Multiphase Optimization Strategy (MOST) framework to identify the most effective combination of self-monitoring strategies. The factorial design will allow the research team to determine the unique and combined impact of each self-monitoring component on weight change. The primary outcome is weight change from baseline to 6 months. The research team will also assess self-monitoring engagement over 6 months and its association with weight change. To complement the main trial, the research team will also randomize half of participants to receive an interactive orientation video, in order to assess its impact on trial retention at 6 months. Overall, the information gathered from this trial will enable the construction of an optimized digital health intervention for weight loss that can be delivered remotely, which, if found to be effective, could have high potential for scalability.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

176

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

    • California
      • Stanford, California, Forenede Stater, 94305
        • Stanford University School of Medicine

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • adults (ages 18+ years)
  • body mass index (BMI) 25.0 to 45.0 kg/m^2
  • smartphone ownership
  • willingness to install a mobile app on their phone
  • access to a personal email account
  • English language proficiency
  • interest in losing weight through behavioral strategies

Exclusion Criteria:

  • concurrent enrollment in another weight management intervention
  • loss of ≥10 lbs. in the past 6 months
  • current use of a weight loss medication
  • prior or planned bariatric surgery
  • current or planned pregnancy in the trial period
  • currently breastfeeding
  • lives with someone else participating in the study
  • hospitalization for a mental health condition in the past 12 months
  • inability to engage in moderate forms of physical activity akin to brisk walking (assessed by the Physical Activity Readiness Questionnaire)
  • if weight loss is contraindicated or might be impacted by a condition or medication (e.g., end stage renal disease, cancer, schizophrenia, dementia, steroids, anti-psychotics)
  • if an individual would be better suited for a more intensive or different type of intervention based on a health condition (e.g., individuals with history of an eating disorder or cardiovascular event, uncontrolled hypertension, or uncontrolled diabetes mellitus)
  • investigator discretion for safety reasons

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Faktoriel opgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Condition 1

Core Only

All participants will receive a 6-month "core" behavioral obesity treatment consisting of goal setting, behavioral lessons, action plans, and tailored feedback - all of which will be delivered remotely.

Eksperimentel: Condition 2

Core + Track Weight

All participants will receive a 6-month "core" behavioral obesity treatment consisting of goal setting, behavioral lessons, action plans, and tailored feedback - all of which will be delivered remotely.

Participants randomized to receive this component will be instructed to self-monitor their body weight daily via a wireless e-scale (e.g., the Fitbit Aria Scale).

Eksperimentel: Condition 3

Core + Track Steps

All participants will receive a 6-month "core" behavioral obesity treatment consisting of goal setting, behavioral lessons, action plans, and tailored feedback - all of which will be delivered remotely.

Participants randomized to receive this component will be instructed to self-monitor their step count daily via a wrist-worn Fitbit activity monitor. A daily step goal will be given that will adapt based on progress.

Eksperimentel: Condition 4

Core + Track Diet

All participants will receive a 6-month "core" behavioral obesity treatment consisting of goal setting, behavioral lessons, action plans, and tailored feedback - all of which will be delivered remotely.

Participants randomized to receive this component will be instructed to self-monitor their dietary intake daily via the Fitbit mobile app. Participants will receive a daily calorie goal.

Eksperimentel: Condition 5

Core + Track Weight + Track Steps

All participants will receive a 6-month "core" behavioral obesity treatment consisting of goal setting, behavioral lessons, action plans, and tailored feedback - all of which will be delivered remotely.

Participants randomized to receive this component will be instructed to self-monitor their body weight daily via a wireless e-scale (e.g., the Fitbit Aria Scale).

Participants randomized to receive this component will be instructed to self-monitor their step count daily via a wrist-worn Fitbit activity monitor. A daily step goal will be given that will adapt based on progress.

Eksperimentel: Condition 6

Core + Track Weight + Track Diet

All participants will receive a 6-month "core" behavioral obesity treatment consisting of goal setting, behavioral lessons, action plans, and tailored feedback - all of which will be delivered remotely.

Participants randomized to receive this component will be instructed to self-monitor their body weight daily via a wireless e-scale (e.g., the Fitbit Aria Scale).

Participants randomized to receive this component will be instructed to self-monitor their dietary intake daily via the Fitbit mobile app. Participants will receive a daily calorie goal.

Eksperimentel: Condition 7

Core + Track Steps + Track Diet

All participants will receive a 6-month "core" behavioral obesity treatment consisting of goal setting, behavioral lessons, action plans, and tailored feedback - all of which will be delivered remotely.

Participants randomized to receive this component will be instructed to self-monitor their step count daily via a wrist-worn Fitbit activity monitor. A daily step goal will be given that will adapt based on progress.

Participants randomized to receive this component will be instructed to self-monitor their dietary intake daily via the Fitbit mobile app. Participants will receive a daily calorie goal.

Eksperimentel: Condition 8

Core + Track Weight + Track Steps + Track Diet

All participants will receive a 6-month "core" behavioral obesity treatment consisting of goal setting, behavioral lessons, action plans, and tailored feedback - all of which will be delivered remotely.

Participants randomized to receive this component will be instructed to self-monitor their body weight daily via a wireless e-scale (e.g., the Fitbit Aria Scale).

Participants randomized to receive this component will be instructed to self-monitor their step count daily via a wrist-worn Fitbit activity monitor. A daily step goal will be given that will adapt based on progress.

Participants randomized to receive this component will be instructed to self-monitor their dietary intake daily via the Fitbit mobile app. Participants will receive a daily calorie goal.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Body Weight Change From Baseline to 6 Months
Tidsramme: baseline, 6 months

change in weight from baseline to 6-month followup (in kg); assessed objectively via e-scale

baseline, 6 months

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Body Weight From Baseline to 1 Month
Tidsramme: baseline, 1 month

change in weight from baseline to 1-month followup (in kg); assessed objectively via e-scale

baseline, 1 month
Body Weight From Baseline to 3 Months
Tidsramme: baseline, 3 month

change in weight from baseline to 3-month followup (in kg); assessed objectively via e-scale

baseline, 3 month
Clinically Significant Weight Loss
Tidsramme: 6 months

proportion of participants achieving ≥5% weight loss from baseline

6 months
BMI Change From Baseline to 6 Months
Tidsramme: baseline, 6 months

change in BMI from baseline to 6-month followup (in kg/m^2); computed from self-reported height and e-scale weight

baseline, 6 months
Caloric Intake Change From Baseline to 6 Months
Tidsramme: baseline, 6 months

change in caloric intake from baseline to 6-month followup (in kcal); assessed using Automated 24-Hour (ASA-24) Dietary Assessment Tool (2 separate 24hr diet recalls at each time point: 1 week day, 1 weekend day)

baseline, 6 months
Physical Activity Change From Baseline to 6 Months
Tidsramme: baseline, 6 months

change in physical activity from baseline to 6-month followup; assessed using Godin Leisure-Time Exercise Questionnaire (GLTEQ)'s MVPA Score Index. The GLTEQ is a self-report measure that assesses a typical week's frequency of engaging in different types of exercise for at least 15 minutes. Minimum score is 0; there is no maximum score. Higher scores indicate more frequent moderate-to-vigorous physical activity. Scores ≥ 24 indicate "active" while scores < 24 indicate "insufficiently active."

baseline, 6 months
Engagement in Self-monitoring Dietary Intake
Tidsramme: 6 months of the intervention

average percent of days in the 6-month intervention of self-monitoring dietary intake; assessed objectively via digital health tools (mobile app)

6 months of the intervention
Engagement in Self-monitoring Weight
Tidsramme: 6 months of the intervention

average percent of days in the 6-month intervention of self-monitoring weight; assessed objectively via digital health tools (e-scale)

6 months of the intervention
Engagement in Self-monitoring Steps
Tidsramme: 6 months of the intervention

average percent of days in the 6-month intervention of self-monitoring steps; assessed objectively via digital health tools (activity monitor)

6 months of the intervention

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Efterforskere

  • Ledende efterforsker: Michele L Patel, PhD, Stanford University

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

22. september 2023

Primær færdiggørelse (Faktiske)

15. juni 2025

Studieafslutning (Faktiske)

23. juni 2025

Datoer for studieregistrering

Først indsendt

10. februar 2022

Først indsendt, der opfyldte QC-kriterier

10. februar 2022

Først opslået (Faktiske)

21. februar 2022

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

4. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

30. oktober 2026

Sidst verificeret

1. oktober 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 64716
  • K23DK129805 (U.S. NIH-bevilling/kontrakt)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

Once the study data have undergone final data cleaning, analysis, and planned publications, the investigators will make the final data collected as part of the proposed research available in electronic form to researchers who request them. Researchers will be asked to submit a data request in writing to the Principal Investigator so that the requested data can be made available while protecting the confidentiality of study participants and ensuring that the proposed research questions do not overlap with planned publication development by the project research team or other groups. The requested dataset will be free of identifiers that would permit linkages to individual research participants. The requestor must agree to maintain the privacy and confidentiality of the data and must indicate how they plan to store the data to demonstrate compliance with secure computing. All publications that emerge from this award will be publicly available via PubMed Central.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .