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

lauantai 7. marraskuuta 2026 päivittänyt: 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.

Tutkimuksen yleiskatsaus

Tila

Rekrytointi

Ehdot

Interventio / Hoito

Yksityiskohtainen kuvaus

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.

Opintotyyppi

Interventio

Ilmoittautuminen (Arvioitu)

60

Vaihe

  • Ei sovellettavissa

Yhteystiedot ja paikat

Tässä osiossa on tutkimuksen suorittajien yhteystiedot ja tiedot siitä, missä tämä tutkimus suoritetaan.

Opiskeluyhteys

  • Nimi: Seher Şen, Assistant Professor
  • Puhelinnumero: 05393919700
  • Sähköposti: seherdalli@gmail.com

Opiskelupaikat

    • Yıldırım
      • Bursa, Yıldırım, Turkki (Türkiye)
        • Rekrytointi
        • Yıldırım Doruk Hastanesi
        • Ottaa yhteyttä:
          • Yıldırım Doruk Hastanesi Seher ŞEN, Assistant Professor
          • Puhelinnumero: 05393919700
          • Sähköposti: seher.sen@mudanya.edu.tr

Osallistumiskriteerit

Tutkijat etsivät ihmisiä, jotka sopivat tiettyyn kuvaukseen, jota kutsutaan kelpoisuuskriteereiksi. Joitakin esimerkkejä näistä kriteereistä ovat henkilön yleinen terveydentila tai aiemmat hoidot.

Kelpoisuusvaatimukset

Opintokelpoiset iät

18 vuotta - 65 vuotta (Aikuinen, Vanhempi Aikuinen)

Hyväksyy terveitä vapaaehtoisia

Ei

Sukupuolet, jotka voivat opiskella

Kaikki

Kuvaus

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

Opintosuunnitelma

Tässä osiossa on tietoja tutkimussuunnitelmasta, mukaan lukien kuinka tutkimus on suunniteltu ja mitä tutkimuksella mitataan.

Miten tutkimus on suunniteltu?

Suunnittelun yksityiskohdat

  • Ensisijainen käyttötarkoitus: Hoito
  • Jako: Ei satunnaistettu
  • Inventiomalli: Tehtävätehtävä
  • Naamiointi: Ei mitään (avoin tarra)

Aseet ja interventiot

Osallistujaryhmä / Arm
Interventio / Hoito
Active Comparator: 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.

Active Comparator: 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.

Kokeellinen: 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.

Kokeellinen: 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.

Mitä tutkimuksessa mitataan?

Ensisijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Body weight
Aikaikkuna: Baseline, Month 3, Month 6

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

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

Weight and height combined to report BMI in kg/m²

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

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

Month 3, Month 6
Percent excess weight loss
Aikaikkuna: 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
Aikaikkuna: Baseline, Month 3, Month 6

Kilograms, by multi-frequency bioelectrical impedance analysis

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

Percent of body weight, by bioelectrical impedance analysis

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

Percent of body weight, by bioelectrical impedance analysis

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

Kilograms, by bioelectrical impedance analysis

Baseline, Month 3, Month 6

Toissijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Fasting plasma glucose
Aikaikkuna: Baseline, Month 6

Concentration in mg/dL from routine clinical laboratory results

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

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

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

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

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

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

Baseline and Month 6
Triglycerides
Aikaikkuna: Baseline and Month 6

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

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

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

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

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

Baseline and Month 6
Serum Iron
Aikaikkuna: Baseline and Month 6

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

Baseline and Month 6
Ferritin
Aikaikkuna: Baseline and Month 6

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

Baseline and Month 6
Vitamin B12
Aikaikkuna: Baseline and Month 6

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

Baseline and Month 6
Folate
Aikaikkuna: Baseline and Month 6

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

Baseline and Month 6
Sodium
Aikaikkuna: Baseline and Month 6

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

Baseline and Month 6
Potassium
Aikaikkuna: Baseline and Month 6

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

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

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

Baseline and Month 6

Yhteistyökumppanit ja tutkijat

Täältä löydät tähän tutkimukseen osallistuvat ihmiset ja organisaatiot.

Sponsori

Opintojen ennätyspäivät

Nämä päivämäärät seuraavat ClinicalTrials.gov-sivustolle lähetettyjen tutkimustietueiden ja yhteenvetojen edistymistä. National Library of Medicine (NLM) tarkistaa tutkimustiedot ja raportoidut tulokset varmistaakseen, että ne täyttävät tietyt laadunvalvontastandardit, ennen kuin ne julkaistaan ​​julkisella verkkosivustolla.

Opi tärkeimmät päivämäärät

Opiskelun aloitus (Todellinen)

Tiistai 12. toukokuuta 2026

Ensisijainen valmistuminen (Arvioitu)

Sunnuntai 15. marraskuuta 2026

Opintojen valmistuminen (Arvioitu)

Tiistai 1. joulukuuta 2026

Opintoihin ilmoittautumispäivät

Ensimmäinen lähetetty

Lauantai 7. marraskuuta 2026

Ensimmäinen toimitettu, joka täytti QC-kriteerit

Lauantai 7. marraskuuta 2026

Ensimmäinen Lähetetty (Todellinen)

Perjantai 13. marraskuuta 2026

Tutkimustietojen päivitykset

Viimeisin päivitys julkaistu (Todellinen)

Perjantai 13. marraskuuta 2026

Viimeisin lähetetty päivitys, joka täytti QC-kriteerit

Lauantai 7. marraskuuta 2026

Viimeksi vahvistettu

Sunnuntai 1. marraskuuta 2026

Lisää tietoa

Tähän tutkimukseen liittyvät termit

Muut tutkimustunnusnumerot

  • MUDU-SBE-SS-06

Yksittäisten osallistujien tietojen suunnitelma (IPD)

Aiotko jakaa yksittäisten osallistujien tietoja (IPD)?

EI

IPD-suunnitelman kuvaus

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.

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