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Intragastric Balloon and Time-Restricted Eating for Weight Loss in Adults With Overweight or Obesity

7. november 2026 opdateret af: Seher Şen, Mudanya University

Effects of Intragastric Balloon and Time-Restricted Intermittent Fasting Diet on Weight Loss and Metabolic Parameters in Adults With Overweight and Obesity

The goal of this non-randomized clinical study is to learn whether an intragastric balloon (IGB) and time-restricted eating (TRE; 16-hour daily fast with an 8-hour eating window), used alone or together, improve weight loss, body composition, and metabolic parameters in adults aged 18 to 65 years with overweight or obesity (body mass index 27.0 to 39.9 kg/m²). Participants are followed in four groups according to whether they have an IGB (placed as part of routine clinical care, not assigned by the study) and whether they choose to follow TRE: (1) standard nutrition therapy, (2) IGB plus standard nutrition therapy, (3) TRE plus standard nutrition therapy, and (4) IGB plus TRE plus standard nutrition therapy. All participants receive the same individualized energy-restricted diet, dietitian follow-up, behavioral education, and physical activity advice. Body weight and body composition are measured at baseline, 3 months, and 6 months; routine laboratory results are recorded at baseline and 6 months.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

This is a prospective, single-center, non-randomized, exploratory (pilot) study with a 2×2 factorial structure. The two factors are intragastric balloon (IGB; present/absent) and time-restricted eating (TRE; yes/no). IGB placement is not a study procedure: it is performed as routine clinical care according to the physician's indication and the patient's preference, and the investigators have no role in that decision. TRE is offered in the dietetics outpatient clinic; participants who wish to follow it are allocated to the TRE groups, and those who do not are followed with standard nutrition therapy alone.

All groups receive the same frequency of dietitian visits, the same behavioral education, comparable energy targets, and the same physical activity advice (7,500 to 10,000 steps per day), so that groups differ only in IGB status and TRE. Body composition is measured by multi-frequency bioelectrical impedance analysis. Laboratory values are taken from routine clinical test results; no additional blood samples are drawn. Dietary intake is assessed with 3-day food records and physical activity with participants' smartphone step counters.

At least 15 participants per group (60 in total) are planned. Main and interaction effects of IGB and TRE will be analyzed with two-way analysis of variance or general linear models, and changes over time with repeated-measures analysis of variance or linear mixed models, adjusting for age, sex, baseline body mass index, comorbidities, physical activity, and energy intake.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

60

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiekontakt

Studiesteder

    • Yıldırım
      • Bursa, Yıldırım, Tyrkiet (Türkiye)
        • Rekruttering
        • Yıldırım Doruk Hastanesi
        • Kontakt:
          • Yıldırım Doruk Hastanesi Seher ŞEN, Assistant Professor
          • Telefonnummer: 05393919700
          • E-mail: seher.sen@mudanya.edu.tr

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 til 65 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Age 18 to 65 years
  • Body mass index (BMI) 27.0 to 39.9 kg/m²; for BMI 27.0 to 29.9 kg/m², at least one obesity-related comorbidity (e.g., insulin resistance, type 2 diabetes mellitus, hypertension, dyslipidemia)
  • BMI of 27 kg/m² or higher for at least 2 years
  • History of unsuccessful non-surgical weight-loss attempts
  • Willingness to participate and written informed consent

Exclusion Criteria:

  • Inflammatory bowel disease or other inflammatory conditions of the gastrointestinal tract (including esophagitis and hiatal hernia of 2 cm or larger)
  • Previous gastrointestinal surgery
  • History of upper gastrointestinal bleeding
  • Gastroparesis
  • Severe psychiatric illness
  • Active malignancy
  • Pregnancy or breastfeeding
  • Alcohol or substance dependence
  • Physical limitation preventing exercise
  • Contraindication to intragastric balloon placement

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: Ikke-randomiseret
  • Interventionel model: Faktoriel opgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Aktiv komparator: Standard Nutrition Therapy

Participants without an intragastric balloon who receive standard energy-restricted nutrition therapy only.

Individualized balanced diet with approximately 25% energy restriction from the estimated daily energy requirement (typically 1000 to 1400 kcal/day; protein 1.0 to 1.5 g/kg/day, carbohydrate 35 to 50% and fat 25 to 35% of energy), with regular dietitian follow-up, behavioral education, and advice to walk 7,500 to 10,000 steps per day.

Aktiv komparator: IGB + Standard Nutrition Therapy

Participants with an intragastric balloon (IGB) placed as part of routine clinical care who receive standard energy-restricted nutrition therapy.

Individualized balanced diet with approximately 25% energy restriction from the estimated daily energy requirement (typically 1000 to 1400 kcal/day; protein 1.0 to 1.5 g/kg/day, carbohydrate 35 to 50% and fat 25 to 35% of energy), with regular dietitian follow-up, behavioral education, and advice to walk 7,500 to 10,000 steps per day.

Endoscopically placed intragastric balloon, performed as part of routine clinical care based on physician indication and patient preference; placement is not assigned by the study. Diet after placement progresses through clear liquid, full liquid, pureed, and solid stages according to routine clinical practice.

Eksperimentel: TRE + Standard Nutrition Therapy

Participants without an intragastric balloon who follow time-restricted eating (TRE; 16-hour daily fast, 8-hour eating window) in addition to standard energy-restricted nutrition therapy.

Individualized balanced diet with approximately 25% energy restriction from the estimated daily energy requirement (typically 1000 to 1400 kcal/day; protein 1.0 to 1.5 g/kg/day, carbohydrate 35 to 50% and fat 25 to 35% of energy), with regular dietitian follow-up, behavioral education, and advice to walk 7,500 to 10,000 steps per day.

Daily food intake limited to an 8-hour eating window with a 16-hour fast. The recommended fasting period is 18:00 to 10:00; alternative 16-hour periods (such as 19:00 to 11:00 or 20:00 to 12:00) are allowed. Water and non-caloric beverages are permitted during the fasting period. Energy and macronutrient targets are identical to standard nutrition therapy. Duration: 6 weeks.

Eksperimentel: IGB + TRE + Standard Nutrition Therapy

Participants with an intragastric balloon (IGB) placed as part of routine clinical care who follow time-restricted eating (TRE; 16-hour daily fast, 8-hour eating window) in addition to standard energy-restricted nutrition therapy.

Individualized balanced diet with approximately 25% energy restriction from the estimated daily energy requirement (typically 1000 to 1400 kcal/day; protein 1.0 to 1.5 g/kg/day, carbohydrate 35 to 50% and fat 25 to 35% of energy), with regular dietitian follow-up, behavioral education, and advice to walk 7,500 to 10,000 steps per day.

Endoscopically placed intragastric balloon, performed as part of routine clinical care based on physician indication and patient preference; placement is not assigned by the study. Diet after placement progresses through clear liquid, full liquid, pureed, and solid stages according to routine clinical practice.

Daily food intake limited to an 8-hour eating window with a 16-hour fast. The recommended fasting period is 18:00 to 10:00; alternative 16-hour periods (such as 19:00 to 11:00 or 20:00 to 12:00) are allowed. Water and non-caloric beverages are permitted during the fasting period. Energy and macronutrient targets are identical to standard nutrition therapy. Duration: 6 weeks.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Body weight
Tidsramme: Baseline, Month 3, Month 6

Kilograms, measured in light clothing without shoes (Tanita MC-780 MA)

Baseline, Month 3, Month 6
Body mass index
Tidsramme: Baseline, Month 3, Month 6

Weight and height combined to report BMI in kg/m²

Baseline, Month 3, Month 6
Percent total weight loss
Tidsramme: Month 3, Month 6

(Baseline weight - follow-up weight) / baseline weight × 100.

Month 3, Month 6
Percent excess weight loss
Tidsramme: Month 3, Month 6

(Baseline weight - follow-up weight) / (baseline weight - ideal weight) × 100; ideal weight at BMI 25 kg/m².

Month 3, Month 6
Fat mass
Tidsramme: Baseline, Month 3, Month 6

Kilograms, by multi-frequency bioelectrical impedance analysis

Baseline, Month 3, Month 6
Body fat percentage
Tidsramme: Baseline, Month 3, Month 6

Percent of body weight, by bioelectrical impedance analysis

Baseline, Month 3, Month 6
Muscle mass percentage
Tidsramme: Baseline, Month 3, Month 6

Percent of body weight, by bioelectrical impedance analysis

Baseline, Month 3, Month 6
Muscle mass
Tidsramme: Baseline, Month 3, Month 6

Kilograms, by bioelectrical impedance analysis

Baseline, Month 3, Month 6

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Fasting plasma glucose
Tidsramme: Baseline, Month 6

Concentration in mg/dL from routine clinical laboratory results

Baseline, Month 6
fasting insulin (µIU/mL)
Tidsramme: Baseline, Month 6

Fasting serum insulin concentration in µIU/mL, obtained from routine clinical laboratory results.

Baseline, Month 6
Glycated Hemoglobin (HbA1c)
Tidsramme: Baseline, Month 6

Glycated hemoglobin (HbA1c) as a percentage of total hemoglobin, obtained from routine clinical laboratory results.

Baseline, Month 6
Total Cholesterol
Tidsramme: Baseline and Month 6

Serum total cholesterol concentration in mg/dL, obtained from routine clinical laboratory results.

Baseline and Month 6
High-Density Lipoprotein (HDL) Cholesterol
Tidsramme: Baseline and Month 6

Serum HDL cholesterol concentration in mg/dL, obtained from routine clinical laboratory results.

Baseline and Month 6
Triglycerides
Tidsramme: Baseline and Month 6

Serum triglyceride concentration in mg/dL, obtained from routine clinical laboratory results.

Baseline and Month 6
Alanine Aminotransferase (ALT)
Tidsramme: Baseline and Month 6

Serum ALT activity in U/L, obtained from routine clinical laboratory results

Baseline and Month 6
Aspartate Aminotransferase (AST)
Tidsramme: Baseline and Month 6

Serum AST activity in U/L, obtained from routine clinical laboratory results.

Baseline and Month 6
Serum Iron
Tidsramme: Baseline and Month 6

Serum iron concentration in µg/dL, obtained from routine clinical laboratory results.

Baseline and Month 6
Ferritin
Tidsramme: Baseline and Month 6

Serum ferritin concentration in ng/mL, obtained from routine clinical laboratory results.

Baseline and Month 6
Vitamin B12
Tidsramme: Baseline and Month 6

Serum vitamin B12 concentration in pg/mL, obtained from routine clinical laboratory results.

Baseline and Month 6
Folate
Tidsramme: Baseline and Month 6

Serum folate concentration in ng/mL, obtained from routine clinical laboratory results.

Baseline and Month 6
Sodium
Tidsramme: Baseline and Month 6

Serum sodium concentration in mmol/L, obtained from routine clinical laboratory results.

Baseline and Month 6
Potassium
Tidsramme: Baseline and Month 6

Serum potassium concentration in mmol/L, obtained from routine clinical laboratory results.

Baseline and Month 6
Daily energy intake
Tidsramme: Baseline and Month 6

Mean daily energy intake in kcal/day, calculated from a 3-day food record.

Baseline and Month 6
Daily Protein Intake
Tidsramme: Baseline and Month 6

Mean daily protein intake in g/day, calculated from a 3-day food record.

Baseline and Month 6
Daily Carbohydrate Intake
Tidsramme: Baseline and Month 6

Mean daily carbohydrate intake in g/day, calculated from a 3-day food record.

Baseline and Month 6
Daily Fat Intake
Tidsramme: Baseline and Month 6

Mean daily fat intake in g/day, calculated from a 3-day food record.

Baseline and Month 6
Daily Step Count
Tidsramme: Baseline and Month 6

Mean number of steps per day, reported by participants from their smartphone step counter.

Baseline and Month 6

Samarbejdspartnere og efterforskere

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

Sponsor

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)

12. maj 2026

Primær færdiggørelse (Anslået)

15. november 2026

Studieafslutning (Anslået)

1. december 2026

Datoer for studieregistrering

Først indsendt

7. november 2026

Først indsendt, der opfyldte QC-kriterier

7. november 2026

Først opslået (Faktiske)

13. november 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

13. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

7. november 2026

Sidst verificeret

1. november 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • MUDU-SBE-SS-06

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

In accordance with the study protocol approved by the ethics committee and national data protection legislation (Law No. 6698 on the Protection of Personal Data), individual participant data will be accessible only to the research team and will not be shared with third parties. Aggregate results will be published in peer-reviewed journals.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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