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Simplifying Diet Tracking in a Digital Weight Loss Intervention

22 mei 2026 bijgewerkt door: Michele Patel, Stanford University

Simplifying Dietary Self-Monitoring in a Digital Weight Loss Intervention

The purpose of this study is to compare two approaches for tracking dietary intake in a 12-month fully digital weight loss intervention: (1) Simplified approach: track Red Zone Foods (e.g., foods high in calories and low in nutritional value) vs. (2) Detailed approach: track all foods and their corresponding calories. In essence, this is a head-to-head comparison of two tracking approaches; the investigators are evaluating whether weight loss is comparable over 12 months, or whether one approach will have greater weight loss.

The investigators will recruit 328 adults. Broadly, adults with overweight or obesity who live in the United States will be eligible. The weight loss intervention will last 12 months. All participants will be asked to track their dietary intake + body weight + steps daily as well as complete weekly behavioral lessons and action plans to promote healthy eating and physical activity. All study tasks will occur remotely. Assessment of body weight and survey measures will occur at the beginning of the trial ("baseline"), and at 1, 6, 12, and 18 months.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Studietype

Ingrijpend

Inschrijving (Geschat)

328

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

  • Verenigde Staten
    • California
      • Palo Alto, California, Verenigde Staten, 94304
        • Stanford University School of Medicine

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Nee

Beschrijving

Inclusion Criteria:

  • adults (ages 18+ years)
  • body mass index (BMI) 25.0 to 45.0 kg/m^2
  • smartphone ownership
  • willing to install a mobile app on personal smartphone
  • access to a personal email account
  • English or Spanish language proficiency
  • interest in losing weight through behavioral strategies
  • living in the United States
  • willing to be randomized

Exclusion Criteria:

  • concurrent enrollment in another weight management intervention
  • loss of ≥5% weight in the past 6 months
  • prior or planned bariatric surgery during the trial period
  • current or planned pregnancy during the trial period, or recent pregnancy in the past 6 months
  • currently breastfeeding or lactating
  • current use of anti-obesity medications
  • living 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
  • medical or psychiatric contraindication (e.g., end stage renal disease, cancer, schizophrenia, dementia, use of steroids, use of antipsychotic medication)
  • 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

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Dubbele

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Simplified (Track Red Zone Foods)
Simplified + Core
Gedragsmatig: Simplified Dietary Self-Monitoring
Participants randomized to receive this intervention are instructed to track their Red Zone Foods (i.e., foods high in calories and low in nutritional value) daily via a web-based checklist. Participants receive a daily Red Zone Food goal.
Gedragsmatig: Core Behavioral Weight Loss Intervention
All participants receive a 12-month core behavioral weight loss intervention consisting of the following: goal setting; daily self-monitoring of body weight & steps; weekly behavioral lessons and action plans to promote healthy eating and physical activity; and tailored feedback. The intervention will be delivered remotely via email and/or text message.
Experimenteel: Detailed (Track All Foods/Calories)
Detailed + Core
Gedragsmatig: Core Behavioral Weight Loss Intervention
All participants receive a 12-month core behavioral weight loss intervention consisting of the following: goal setting; daily self-monitoring of body weight & steps; weekly behavioral lessons and action plans to promote healthy eating and physical activity; and tailored feedback. The intervention will be delivered remotely via email and/or text message.
Gedragsmatig: Detailed Dietary Self-Monitoring
Participants randomized to receive this intervention are instructed to track all foods/drinks and their corresponding calories daily via a mobile app. Participants receive a daily calorie goal.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Weight Change from Baseline to 12 Months
Tijdsspanne: Baseline, 12 Months
mean change in body weight (kg); assessed objectively via e-scale using standardized procedures (e.g., place the scale on a hard surface; collect weight in the morning, without clothing, prior to eating/drinking)
Baseline, 12 Months

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Weight Change from Baseline to 1 Month
Tijdsspanne: Baseline, 1 Month
mean change in body weight (kg); assessed objectively via e-scale using standardized procedures
Baseline, 1 Month
Weight Change from Baseline to 6 Months
Tijdsspanne: Baseline, 6 Months
mean change in body weight (kg); assessed objectively via e-scale using standardized procedures
Baseline, 6 Months
Weight Change from Baseline to 18 Months
Tijdsspanne: Baseline, 18 Months
mean change in body weight (kg); assessed objectively via e-scale using standardized procedures
Baseline, 18 Months
Caloric Intake Change from Baseline to 12 Months
Tijdsspanne: Baseline, 12 Months
mean change in daily caloric intake (kilocalories); assessed via the Automated Self-Administered 24-Hour Dietary Assessment Tool (ASA24): 2 separate diet recalls per time point: 1 week day, 1 weekend day
Baseline, 12 Months
Diet Quality Change from Baseline to 12 Months
Tijdsspanne: Baseline, 12 Months
mean change in diet quality; assessed via the Healthy Eating Index, calculated from ASA24 data; score range: 0 to 100, with higher scores indicating better diet quality
Baseline, 12 Months
Step Count Change from Baseline to 12 Months
Tijdsspanne: Baseline, 12 Months
mean change in step count; assessed objectively via activity tracker
Baseline, 12 Months
Health-Related Quality of Life (Physical Health) Change from Baseline to 12 Months
Tijdsspanne: Baseline, 12 Months
mean change in health-related quality of life (Physical Component Summary); assessed via the SF-36 survey; score range: 0 to 100, with higher scores indicating better quality of life
Baseline, 12 Months
Health-Related Quality of Life (Mental Health) Change from Baseline to 12 Months
Tijdsspanne: Baseline, 12 Months
mean change in health-related quality of life (Mental Component Summary); assessed via the SF-36 survey; score range: 0 to 100, with higher scores indicating better quality of life
Baseline, 12 Months
Engagement in Self-Monitoring Dietary Intake
Tijdsspanne: daily during the 12-month intervention
operationalized as average percentage of days in the 12-month intervention of self-monitoring dietary intake (Red Zone Foods for Simplified arm vs. all foods/calories for Detailed arm); assessed via e-checklist for Simplified arm and via app for Detailed arm; will report median (IQR) if data are non-normally distributed
daily during the 12-month intervention
Engagement in Self-Monitoring Weight
Tijdsspanne: daily during the 12-month intervention
operationalized as average percentage of days in the 12-month intervention of self-monitoring body weight; assessed via e-scale; will report median (IQR) if data are non-normally distributed
daily during the 12-month intervention
Engagement in Self-Monitoring Steps
Tijdsspanne: daily during the 12-month intervention
operationalized as average percentage of days in the 12-month intervention of self-monitoring steps; assessed via activity tracker; will report median (IQR) if data are non-normally distributed
daily during the 12-month intervention

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Stanford University

Onderzoekers

  • Hoofdonderzoeker: Michele L. Patel, PhD, Stanford University

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

1 mei 2027

Primaire voltooiing (Geschat)

30 april 2030

Studie voltooiing (Geschat)

31 oktober 2030

Studieregistratiedata

Eerst ingediend

14 mei 2026

Eerst ingediend dat voldeed aan de QC-criteria

14 mei 2026

Eerst geplaatst (Werkelijk)

22 mei 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

28 mei 2026

Laatste update ingediend die voldeed aan QC-criteria

22 mei 2026

Laatst geverifieerd

1 mei 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • 87051

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

JA

Beschrijving IPD-plan

The de-identified dataset and metadata will be made available through a public repository. It will include the primary outcome (weight change), secondary outcomes, and participant level characteristics. Data will be available in an Excel spreadsheet, whereby each row corresponds to a unique participant's data, and columns represent the different variables mentioned, by time point.

IPD-tijdsbestek voor delen

The shared dataset and metadata will be preserved and made publicly available to share for at least 3 years following completion of the project, in accordance with NIH regulations. They will be made available upon publication of the primary outcomes paper in a peer-reviewed journal, or at the end of the grant period (whichever comes first).

IPD-toegangscriteria voor delen

Publicly available.

IPD delen Ondersteunend informatietype

  • LEERPROTOCOOL
  • SAP
  • ICF

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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