- ICH GCP
- USA klinikai vizsgálatok nyilvántartása
- Klinikai vizsgálat NCT07809152
Collagen Supplements and Post-MBS Muscle Mass/Body Image
Relationship Between Collagen-Containing Supplement Use and Muscle Mass and Body Image Following Metabolic and Bariatric Surgery: A Prospective Observational Study
This prospective, observational cohort study aims to evaluate whether the use of collagen-containing supplements is associated with differences in muscle mass, body composition, and body image among patients who have undergone sleeve gastrectomy (SG). The study will be conducted at the General Surgery outpatient clinic of a private hospital in Bursa, Türkiye, between May 2026 and March 2027, and will enroll adult patients (aged 18-65 years) who meet current ASMBS/IFSO eligibility criteria for metabolic and bariatric surgery.
Participants will be naturally allocated into two observational groups based on their own choice to use or not use collagen-containing supplements; no supplement will be provided or recommended by the study team, and no intervention will be made to participants' standard clinical care. All patients will be followed according to routine clinical practice preoperatively and at 2 weeks, 1 month, 3 months, and 6 months postoperatively.
Primary outcome measures include anthropometric parameters (body weight, BMI, fat mass, fat mass percentage, fat-free mass, muscle mass, percentage of weight loss, percentage of excess weight loss, waist and hip circumference) assessed via bioelectrical impedance analysis (Tanita MC-780 MA), and body image assessed using the Turkish-validated Body Shape Questionnaire (BSQ). Secondary outcomes include biochemical parameters, comorbidities, and macronutrient intake data obtained from 3-day dietary records analyzed using the BEBİS nutrition software.
The study hypothesizes that patients using collagen-containing supplements will show significant differences in muscle mass and body composition parameters compared with non-users, and that supplement use will be significantly associated with BSQ scores. A sample size of approximately 52 participants per group was calculated using G*Power 3.1 (one-way ANOVA, Cohen's f = 0.25, α = 0.05, power = 0.80).
A tanulmány áttekintése
Állapot
Körülmények
Beavatkozás / kezelés
Tanulmány típusa
Beiratkozás (Becsült)
Kapcsolatok és helyek
Tanulmányi kapcsolat
- Név: Seher Şen, Assistant Professor
- Telefonszám: +905393919700
- E-mail: seherdalli@gmail.com
Tanulmányozza a kapcsolattartók biztonsági mentését
- Név: Emre Şen, Master's degree graduate
- Telefonszám: 0 532 163 30 87
Tanulmányi helyek
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Yıldırım
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Bursa, Yıldırım, Törökország (Türkiye)
- Toborzás
- Yıldırım Doruk Hastanesi
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Kapcsolatba lépni:
- Telefonszám: 05393919700
- E-mail: seher.sen@mudanya.edu.tr
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Részvételi kritériumok
Jogosultsági kritériumok
Tanulmányozható életkorok
- Felnőtt
- Idősebb felnőtt
Egészséges önkénteseket fogad
Mintavételi módszer
Tanulmányi populáció
Leírás
Inclusion Criteria:
- Patients with a BMI ≥ 35 kg/m², regardless of the presence of comorbidities
- Patients with a BMI of 30-34.9 kg/m² who have an obesity-related metabolic disease and are considered eligible for surgical treatment
- Patients who have undergone metabolic and bariatric surgery (MBS) in accordance with current ASMBS/IFSO guidelines (Eisenberg et al., 2022)
- Patients under regular postoperative follow-up
- Age 18-65 years
Exclusion Criteria:
- Inflammatory bowel disease
- History of upper gastrointestinal bleeding
- Severe psychiatric disorders
- Active cancer diagnosis
- Pregnancy or breastfeeding
- Alcohol or substance dependence
- Physical limitations preventing participation in exercise
Tanulási terv
Hogyan készül a tanulmány?
Tervezési részletek
Kohorszok és beavatkozások
Csoport / Kohorsz |
Beavatkozás / kezelés |
|---|---|
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1. Grup
Group/Cohort Label: Collagen Supplement Users (Kolajen Kullananlar) Description: Participants who, based on their own preference, use a collagen-containing supplement product following sleeve gastrectomy, without any intervention or recommendation from the study team.
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Collagen-containing supplement products used at the participants' own discretion following sleeve gastrectomy.
The type of product, daily dosage, and duration of use were self-reported by participants
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2. Grup
Group/Cohort Label: Non-Users of Collagen Supplement (Kolajen Kullanmayanlar) Description: Participants who do not use any collagen-containing supplement product following sleeve gastrectomy, followed under routine clinical care.
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Mit mér a tanulmány?
Elsődleges eredményintézkedések
Eredménymérő |
Intézkedés leírása |
Időkeret |
|---|---|---|
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Change in Body Weight
Időkeret: Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Body weight (kg) measured using a Tanita MC-780 MA device.
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Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Change in Body Shape Questionnaire (BSQ) Score
Időkeret: Preoperative and postoperative 6 months
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Body image concerns were assessed using the Body Shape Questionnaire (BSQ-34), a validated instrument for the Turkish population.
This 34-item self-report scale evaluates weight-related concerns and dissatisfaction with body shape over the preceding four weeks.
Each item is scored from 1 (never) to 6 (always), with a total score range of 34 to 204.
Higher scores indicate greater dissatisfaction with body shape, i.e., a worse outcome.
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Preoperative and postoperative 6 months
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Change in Body Mass Index (BMI)
Időkeret: Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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BMI calculated as body weight (kg) divided by height squared (m²).
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Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Percentage of Total Weight Loss (%TWL)
Időkeret: Postoperative and 6 months
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Calculated as (preoperative weight - postoperative weight) / preoperative weight × 100.
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Postoperative and 6 months
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Percentage of Excess Weight Loss (%EWL)
Időkeret: Postoperative and 6 months
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Calculated as (preoperative weight - postoperative weight) / (preoperative weight - ideal weight) × 100.
Ideal body weight was calculated assuming a BMI of 25 kg/m².
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Postoperative and 6 months
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Change in Fat Mass
Időkeret: Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Fat mass (kg) assessed by multi-frequency bioelectrical impedance analysis (BIA) using a Tanita MC-780 MA device.
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Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Change in Fat Mass Percentage
Időkeret: Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Fat mass expressed as a percentage of total body weight, assessed by bioelectrical impedance analysis (BIA) using a Tanita MC-780 MA device.
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Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Change in Muscle Mass
Időkeret: Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Muscle mass (kg) assessed by bioelectrical impedance analysis (BIA) using a Tanita MC-780 MA device.
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Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Change in Muscle Mass Percentage
Időkeret: Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Muscle mass expressed as a percentage of total body weight, assessed by bioelectrical impedance analysis (BIA) using a Tanita MC-780 MA device.
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Preoperative, and postoperative 2 weeks, 1 month, 3 months, and 6 months
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Másodlagos eredményintézkedések
Eredménymérő |
Intézkedés leírása |
Időkeret |
|---|---|---|
|
Change in Fasting Blood Glucose
Időkeret: Preoperative and 6 months
|
Fasting blood glucose (mg/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Fasting Insulin
Időkeret: Preoperative and 6 months
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Fasting insulin (µIU/mL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in HbA1c
Időkeret: Preoperative and 6 months
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Glycated hemoglobin (HbA1c, %) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in LDL Cholesterol
Időkeret: Preoperative and 6 months
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LDL cholesterol (mg/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in HDL Cholesterol
Időkeret: Preoperative and 6 months
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HDL cholesterol (mg/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Triglycerides
Időkeret: Preoperative and postoperative 6 months
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Triglycerides (mg/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and postoperative 6 months
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Change in Total Cholesterol
Időkeret: Preoperative and postoperative 6 months
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Total cholesterol (mg/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and postoperative 6 months
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Change in ALT
Időkeret: Preoperative and 6 months
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Alanine aminotransferase (ALT, U/L) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in AST
Időkeret: Preoperative and 6 months
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Aspartate aminotransferase (AST, U/L) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Uric Acid
Időkeret: Preoperative and 6 months
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Uric acid (mg/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Urea
Időkeret: Preoperative and 6 months
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Urea (mg/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Hemoglobin
Időkeret: Preoperative and 6 months
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Hemoglobin (g/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Hematocrit
Időkeret: Preoperative and 6 months
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Hematocrit (%) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Ferritin
Időkeret: Preoperative and 6 months
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Ferritin (ng/mL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Serum Iron
Időkeret: Preoperative and 6 months
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Serum iron (µg/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Vitamin B12
Időkeret: Preoperative and 6 months
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Vitamin B12 (pg/mL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Folic Acid
Időkeret: Preoperative and 6 months
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Folic acid (ng/mL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Magnesium
Időkeret: Preoperative and 6 months
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Magnesium (mg/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Total Calcium
Időkeret: Preoperative and 6 months
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Total calcium (mg/dL) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Serum Sodium
Időkeret: Preoperative and 6 months
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Serum sodium (mEq/L) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Change in Serum Potassium
Időkeret: Preoperative and 6 months
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Serum potassium (mEq/L) obtained from routine clinical laboratory follow-up.
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Preoperative and 6 months
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Együttműködők és nyomozók
Szponzor
Tanulmányi rekorddátumok
Tanulmány főbb dátumok
Tanulmány kezdete (Tényleges)
Elsődleges befejezés (Becsült)
A tanulmány befejezése (Becsült)
Tanulmányi regisztráció dátumai
Először benyújtva
Először nyújtották be, amely megfelel a minőségbiztosítási kritériumoknak
Első közzététel (Tényleges)
Tanulmányi rekordok frissítései
Utolsó frissítés közzétéve (Tényleges)
Az utolsó frissítés elküldve, amely megfelel a minőségbiztosítási kritériumoknak
Utolsó ellenőrzés
Több információ
A tanulmányhoz kapcsolódó kifejezések
További vonatkozó MeSH feltételek
Egyéb vizsgálati azonosító számok
- MUDU-SBE-SS-05
Terv az egyéni résztvevői adatokhoz (IPD)
Tervezi megosztani az egyéni résztvevői adatokat (IPD)?
IPD terv leírása
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