ObesityBCKYL-YDBNCT07636239
Eating Behavior, Nutritional Status and Appetite Hormones After Bariatric Surgery
An observational study of Obesity and Bariatric Surgery, run by Özlem ÖZPAK AKKUŞ at 1 site in Turkey (Türkiye).
Trial summary
This study aims to evaluate changes in eating behavior attitudes, nutritional status, and appetite-regulating hormonal parameters in individuals who have undergone Laparoscopic Sleeve Gastrectomy (LSG). The study will be conducted at Bursa Yıldırım Doruk Hospital, Department of General Surgery. Read more about this study
- Who is it for?
- Ages 18 to 50 years
- Conditions the study is for
- Obesity, Bariatric Surgery, Laparoscopic Sleeve Gastrectomy
- What is being tested?
- Anthropometric Measurements and Dietary Assessment
- How many people
- 40 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Jul 2026to 1 Feb 2027
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 50 years
- All sexes
- No healthy volunteers
- Adult
Study population: Adult patients who underwent Laparoscopic Sleeve Gastrectomy (LSG) within the last month at Bursa Yıldırım Doruk Hospital, General Surgery Clinic, under the supervision of Assoc. Prof. Dogukan Durak, and who meet the inclusion and exclusion criteria.
Who may be able to join
- Having undergone Laparoscopic Sleeve Gastrectomy (LSG) within the last month
- Aged between 18-50 years
- Signing the informed consent form
- Having a Body Mass Index (BMI) of 40 kg/m2 or between 35-40 kg/m2 with obesity-related comorbidities
- No diagnosis of depression
- No eating behavior disorder
- No psychiatric disorder
Who cannot join
- Not having undergone Laparoscopic Sleeve Gastrectomy (LSG) or not planning to undergo bariatric surgery
- Not being in the age range of 18-50 years
- Not signing the informed consent form
- Having a Body Mass Index (BMI) greater than 40 kg/m2 or less than 35 kg/m2 without obesity-related comorbidities
- Having a diagnosis of depression
- Having an eating behavior disorder
- Having a psychiatric disorder
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Turkey (Türkiye)1 site
Bursa Yıldırım Doruk Hastanesi, General Surgery Clinic
Bursa, Bursa, 16130
Özlem ÖZPAK AKKUŞ, Assoc. Prof., +903246253300, dytozlemozpak@hotmail.com
Doğukan DURAK, Assoc. Prof., +905327243733, dogukandurak404@hotmail.com
About this study
Official title: Evaluation of Changes in Postoperative Eating Behavior Attitudes, Nutritional Status, and Some Hormonal Parameters Regulating Appetite in Surgical Weight Management
This study aims to evaluate changes in eating behavior attitudes, nutritional status, and appetite-regulating hormonal parameters in individuals who have undergone Laparoscopic Sleeve Gastrectomy (LSG). The study will be conducted at Bursa Yıldırım Doruk Hospital, Department of General Surgery. A total of 40 volunteer participants who underwent LSG within the last month will be included. Participants will be assessed at baseline (shortly after surgery) and at 6-month follow-up. Assessments will include anthropometric measurements (body weight, height, waist and hip circumference, BMI, waist-to-hip ratio), 3-day dietary intake records analyzed using BeBIS 8.2 software, and the Adult Eating Behavior Scale. Biochemical parameters including fasting blood glucose, total cholesterol, triglycerides, HDL, LDL, VLDL cholesterol, and insulin will be obtained from patient files and analyzed using Advia Chemistry 2400 and Advia XPT devices. Additionally, appetite-regulating hormones (ghrelin, GLP-1, PYY) will be analyzed from residual blood samples using the ELISA method with RelAssay Diagnostics kits by Teknogen Bioengineering Laboratory. All data will be compared between baseline and 6-month follow-up to evaluate the impact of bariatric surgery on nutritional and hormonal outcomes.
Read the detailed description
This observational study will be conducted at Bursa Yıldırım Doruk Hospital, General Surgery Clinic, under the supervision of Assoc. Prof. Dogukan Durak. Forty volunteer participants who underwent Laparoscopic Sleeve Gastrectomy (LSG) within the last month and meet the inclusion and exclusion criteria will be enrolled after signing an informed consent form.
Assessments will be performed at two time points: at baseline (shortly after surgery) and at 6-month follow-up.
Anthropometric Measurements: Body weight, height, waist and hip circumference will be measured. BMI and waist-to-hip ratio will be calculated accordingly. Waist circumference will be evaluated according to WHO criteria.
Dietary Assessment: A 3-day dietary intake record will be collected from each participant at both time points. Food portion sizes will be estimated using the "Food and Nutrient Photo Catalog." Energy and macronutrient intake will be analyzed using BeBIS 8.2 software and evaluated according to the Turkish Dietary Guidelines 2022 (TUBER 2022).
Eating Behavior Assessment: The Adult Eating Behavior Scale (developed by Celik et al.) will be administered at both time points. The scale consists of 18 items and 5 subscales, scored between 0-100. Higher scores indicate more positive attitudes toward eating behavior.
Biochemical and Hormonal Parameters: After 12-hour fasting, the following biochemical parameters will be obtained from patient files: fasting blood glucose (FBG), total cholesterol (TC), triglycerides (TG), high-density lipoprotein (HDL) cholesterol, low-density lipoprotein (LDL) cholesterol, very low-density lipoprotein (VLDL) cholesterol, and insulin. Routine biochemical parameters and lipid profile will be analyzed spectrophotometrically using the Advia Chemistry 2400 device, while insulin will be measured by chemiluminescence using the Advia XPT device. Additionally, appetite-regulating hormones including ghrelin, glucagon-like peptide-1 (GLP-1), and peptide YY (PYY) will be analyzed from residual blood samples stored at -20°C by Teknogen Bioengineering Laboratory using the ELISA method with an automated microplate reader (Biotek TS800) and RelAssay Diagnostics commercial kits (Ankara, Turkey).
All data will be compared between baseline and 6-month follow-up using appropriate statistical methods.
- Conditions
- Obesity, Bariatric Surgery, Laparoscopic Sleeve Gastrectomy, Eating Behavior, Nutritional Status
- Being tested
- Anthropometric Measurements and Dietary Assessment
- Keywords
- Obesity, Bariatric Surgery, Laparoscopic Sleeve Gastrectomy, Eating Behavior, Nutritional status, Ghrelin, GLP-1, Peptite YY, Appetite hormones, Body mass index, Weight loss, Dietary intake
- Medical subject headings
- Obesity, Feeding Behavior, Weight Loss
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Anthropometric Measurements and Dietary AssessmentOther
Also called Biochemical and Hormonal Parameter Analysis, Adult Eating Behavior Scale, 3-Day Dietary Intake Record
Anthropometric measurements (body weight, height, waist and hip circumference, BMI, waist-to-hip ratio), 3-day dietary intake records, Adult Eating Behavior Scale, and biochemical and hormonal parameters (fasting blood glucose, lipid profile, insulin, ghrelin, GLP-1, PYY) will be assessed at baseline and at 6-month follow-up.
| Study group | Role | What they receive |
|---|---|---|
| LSG Patients | Individuals who underwent Laparoscopic Sleeve Gastrectomy (LSG) within the last month at Bursa Yıldırım Doruk Hospital, General Surgery Clinic, and meet the inclusion and exclusion criteria. Participants will be assessed at baseline (shortly after surgery) and at 6-month follow-up. Receives: Other: Anthropometric Measurements and Dietary Assessment |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Serum Ghrelin Concentration (pg/mL)
Change in serum ghrelin levels between baseline and 6-month follow-up, assessed by ELISA method.
Measured: Baseline and 6 months after surgery
Change in Serum GLP-1 Concentration (pmol/L)
Change in serum glucagon-like peptide-1 (GLP-1) levels between baseline and 6-month follow-up, assessed by ELISA method.
Measured: Baseline and 6 months after surgery
Change in Serum PYY Concentration (pg/mL)
Change in serum peptide YY (PYY) levels between baseline and 6-month follow-up, assessed by ELISA method.
Measured: Baseline and 6 months after surgery
Change in Adult Eating Behavior Scale Total Score (0-100)
Change in Adult Eating Behavior Scale total score between baseline and 6-month follow-up. Scale is scored between 0-100; higher scores indicate more positive eating behavior attitudes.
Measured: Baseline and 6 months after surgery
Change in Daily Energy Intake (kcal/day)
Change in daily energy intake assessed by 3-day dietary intake records at baseline and 6-month follow-up. Food portions will be estimated using the Food and Nutrient Photo Catalog. Data will be analyzed using BeBIS 8.2 software and evaluated according to Turkish Dietary Guidelines 2022.
Measured: Baseline and 6 months after surgery
Change in Daily Protein Intake (g/day)
Change in daily protein intake assessed by 3-day dietary intake records at baseline and 6-month follow-up. Food portions will be estimated using the Food and Nutrient Photo Catalog. Data will be analyzed using BeBIS 8.2 software and evaluated according to Turkish Dietary Guidelines 2022
Measured: Baseline and 6 months after surgery
Change in Daily Carbohydrate Intake (g/day)
Change in daily carbohydrate intake assessed by 3-day dietary intake records at baseline and 6-month follow-up. Food portions will be estimated using the Food and Nutrient Photo Catalog. Data will be analyzed using BeBIS 8.2 software and evaluated according to Turkish Dietary Guidelines 2022.
Measured: Baseline and 6 months after surgery
Change in Daily Fat Intake (g/day)
Change in daily fat intake assessed by 3-day dietary intake records at baseline and 6-month follow-up. Food portions will be estimated using the Food and Nutrient Photo Catalog. Data will be analyzed using BeBIS 8.2 software and evaluated according to Turkish Dietary Guidelines 2022.
Measured: Baseline and 6 months after surgery
Secondary outcomes (12)
Change in Body Weight (kg)
Change in body weight between baseline and 6-month follow-up.
Measured: Baseline and 6 months after surgery
Change in Body Mass Index (kg/m²)
Change in BMI between baseline and 6-month follow-up. Weight and height will be combined to report BMI in kg/m².
Measured: Baseline and 6 months after surgery
Change in Waist Circumference (cm)
Change in waist circumference between baseline and 6-month follow-up.
Measured: Baseline and 6 months after surgery
Change in Hip Circumference (cm)
Change in hip circumference between baseline and 6-month follow-up.
Measured: Baseline and 6 months after surgery
Change in Waist-to-Hip Ratio
Change in waist-to-hip ratio between baseline and 6-month follow-up. Waist and hip circumference measurements will be combined to calculate the waist-to-hip ratio.
Measured: Baseline and 6 months after surgery
Change in Fasting Blood Glucose Concentration (mg/dL)
Change in fasting blood glucose levels between baseline and 6-month follow-up.
Measured: Baseline and 6 months after surgery
Change in Total Cholesterol Concentration (mg/dL)
Change in total cholesterol levels between baseline and 6-month follow-up.
Measured: Baseline and 6 months after surgery
Change in Triglyceride Concentration (mg/dL)
Change in triglyceride levels between baseline and 6-month follow-up.
Measured: Baseline and 6 months after surgery
Change in HDL Cholesterol Concentration (mg/dL)
Change in high-density lipoprotein (HDL) cholesterol levels between baseline and 6-month follow-up.
Measured: Baseline and 6 months after surgery
Change in LDL Cholesterol Concentration (mg/dL)
Change in low-density lipoprotein (LDL) cholesterol levels between baseline and 6-month follow-up.
Measured: Baseline and 6 months after surgery
Change in VLDL Cholesterol Concentration (mg/dL)
Change in very low-density lipoprotein (VLDL) cholesterol levels between baseline and 6-month follow-up.
Measured: Baseline and 6 months after surgery
Change in Fasting Insulin Concentration (µIU/mL)
Change in fasting insulin levels between baseline and 6-month follow-up.
Measured: Baseline and 6 months after surgery
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Jun 2026
- Study start1 Jul 2026 (estimated)
- Primary completion1 Jan 2027 (estimated)
- Study completion1 Feb 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (14)Papers the sponsor has linked to this study.
- Other trials for ObesityStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 40 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Özlem ÖZPAK AKKUŞ
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Özlem ÖZPAK AKKUŞ, Toros University
- Investigators
- Özlem ÖZPAK AKKUŞ, Assoc. Prof., Principal investigator, Toros University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07636239
- Sponsor's protocol ID
- BCKLY-YDB-2026
- Acronym
- BCKYL-YDB
- Status last verified
- Jun 2026
- First submitted
- 20 May 2026
- Last updated
- 9 Jun 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Individual participant data will not be shared due to patient privacy and confidentiality concerns in accordance with Turkish Personal Data Protection Law (KVKK). Aggregate study results will be made available through peer-reviewed publication.
Publications
Celik E, Karabulut E, Bilgic P. Bariatrik Cerrahi Hastalarinda Beslenme ve Davranis Tutumu Olcegi. Bes Diy Derg. 2017;45(2):107-15.
Pekcan G, Sanlier N, Bas M, Acar Tek N, Gokmen Ozel H. Turkiye Beslenme Rehberi (TUBER) 2022. Ankara: Hazar Reklamcilik; 2022.
Beslenme Bilgi Sistemleri Paket Programi (BeBIS 8.2). Istanbul: Software NDB; 2015.
Merdol TK. Toplu Beslenme Yapilan Kurumlar icin Standard Yemek Tarifleri. Hatipoglu Yayinlari; 2003.
Rakicioglu N, Tek NA, Ayaz A, Pekcan G. Yemek ve Besin Fotograf Katalogu Olcu ve Miktarlar. Nadir Kitap; 2012.
Physical status: the use and interpretation of anthropometry. Report of a WHO Expert Committee. World Health Organ Tech Rep Ser. 1995;854:1-452.
PubMed 8594834Pekcan G. Beslenme Durumunun Saptanmasi. Diyet El Kitabi. Ankara: Hatipoglu Yayinevi; 2013:67-142.
Baltaci G. Obezite ve egzersiz. Saglik Bakanligi Yayinlari, Ankara; 2008.
World Health Organization. Prevention and management of the global epidemic of obesity. Report of the WHO Consultation on Obesity. Geneva: WHO; 1997.
Rigamonti AE, Bini S, Rocco MC, Giardini V, Massimini D, Crippa MG, Saluzzi A, Casati M, Marazzi N, Perotti M, Cimino V, Grassi G, Sartorio A, Pincelli AI. Post-prandial anorexigenic gut peptide, appetite and glucometabolic responses at different eating rates in obese patients undergoing laparoscopic sleeve gastrectomy. Endocrine. 2017 Jan;55(1):113-123. doi: 10.1007/s12020-016-0933-6. Epub 2016 Mar 29.
PubMed 27022941Devlin MJ, Goldfein JA, Flancbaum L, Bessler M, Eisenstadt R. Surgical management of obese patients with eating disorders: a survey of current practice. Obes Surg. 2004 Oct;14(9):1252-7. doi: 10.1381/0960892042386940.
PubMed 15527644Brown W, Dixon JB, Brien PO. Management of obesity--the role of surgery. Aust Fam Physician. 2006 Aug;35(8):584-6.
PubMed 16894430Katsanos CS, Madura JA 2nd, Roust LR. Essential amino acid ingestion as an efficient nutritional strategy for the preservation of muscle mass following gastric bypass surgery. Nutrition. 2016 Jan;32(1):9-13. doi: 10.1016/j.nut.2015.07.005. Epub 2015 Aug 5.
PubMed 26456190Sherf Dagan S, Goldenshluger A, Globus I, Schweiger C, Kessler Y, Kowen Sandbank G, Ben-Porat T, Sinai T. Nutritional Recommendations for Adult Bariatric Surgery Patients: Clinical Practice. Adv Nutr. 2017 Mar 15;8(2):382-394. doi: 10.3945/an.116.014258. Print 2017 Mar.
PubMed 28298280
Study at a glance
From the registry record, last updated by the sponsor on 9 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of Changes in Postoperative Eating Behavior Attitudes, Nutritional Status, and Some Hormonal Parameters Regulating Appetite in Surgical Weight Management
- ClinicalTrials.gov ID
- NCT07636239
- Acronym / sponsor ID
- BCKYL-YDB / BCKLY-YDB-2026
- Conditions
- Obesity, Bariatric Surgery, Laparoscopic Sleeve Gastrectomy, Eating Behavior, Nutritional Status
- Keywords
- Obesity, Bariatric Surgery, Laparoscopic Sleeve Gastrectomy, Eating Behavior, Nutritional status, Ghrelin, GLP-1, Peptite YY
- Study type
- Observational
- Recruitment status
- Not yet recruiting
- Enrolment
- 40 participants (estimated)
- Lead sponsor
- Özlem ÖZPAK AKKUŞUniversity, hospital or other
- Study start
- 1 Jul 2026 (estimated)
- Primary completion
- 1 Jan 2027 (estimated)
- Study completion
- 1 Feb 2027 (estimated)
- First posted
- 9 Jun 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study aims to evaluate changes in eating behavior attitudes, nutritional status, and appetite-regulating hormonal parameters in individuals who have undergone Laparoscopic Sleeve Gastrectomy (LSG). The study will be conducted at Bursa Yıldırım Doruk Hospital, Department of General Surgery. A total of 40 volunteer participants who underwent LSG within the last month will be included. Participants will be assessed at baseline (shortly after surgery) and at 6-month follow-up. Assessments will include anthropometric measurements (body weight, height, waist and hip circumference, BMI, waist-to-hip ratio), 3-day dietary intake records analyzed using BeBIS 8.2 software, and the Adult Eating Behavior Scale. Biochemical parameters including fasting blood glucose, total cholesterol, triglycerides, HDL, LDL, VLDL cholesterol, and insulin will be obtained from patient files and analyzed using Advia Chemistry 2400 and Advia XPT devices. Additionally, appetite-regulating hormones (ghrelin, GLP-1, PYY) will be analyzed from residual blood samples using the ELISA method with RelAssay Diagnostics kits by Teknogen Bioengineering Laboratory. All data will be compared between baseline and 6-month follow-up to evaluate the impact of bariatric surgery on nutritional and hormonal outcomes.
Detailed description
This observational study will be conducted at Bursa Yıldırım Doruk Hospital, General Surgery Clinic, under the supervision of Assoc. Prof. Dogukan Durak. Forty volunteer participants who underwent Laparoscopic Sleeve Gastrectomy (LSG) within the last month and meet the inclusion and exclusion criteria will be enrolled after signing an informed consent form.
Assessments will be performed at two time points: at baseline (shortly after surgery) and at 6-month follow-up.
Anthropometric Measurements: Body weight, height, waist and hip circumference will be measured. BMI and waist-to-hip ratio will be calculated accordingly. Waist circumference will be evaluated according to WHO criteria.
Dietary Assessment: A 3-day dietary intake record will be collected from each participant at both time points. Food portion sizes will be estimated using the "Food and Nutrient Photo Catalog." Energy and macronutrient intake will be analyzed using BeBIS 8.2 software and evaluated according to the Turkish Dietary Guidelines 2022 (TUBER 2022).
Eating Behavior Assessment: The Adult Eating Behavior Scale (developed by Celik et al.) will be administered at both time points. The scale consists of 18 items and 5 subscales, scored between 0-100. Higher scores indicate more positive attitudes toward eating behavior.
Biochemical and Hormonal Parameters: After 12-hour fasting, the following biochemical parameters will be obtained from patient files: fasting blood glucose (FBG), total cholesterol (TC), triglycerides (TG), high-density lipoprotein (HDL) cholesterol, low-density lipoprotein (LDL) cholesterol, very low-density lipoprotein (VLDL) cholesterol, and insulin. Routine biochemical parameters and lipid profile will be analyzed spectrophotometrically using the Advia Chemistry 2400 device, while insulin will be measured by chemiluminescence using the Advia XPT device. Additionally, appetite-regulating hormones including ghrelin, glucagon-like peptide-1 (GLP-1), and peptide YY (PYY) will be analyzed from residual blood samples stored at -20°C by Teknogen Bioengineering Laboratory using the ELISA method with an automated microplate reader (Biotek TS800) and RelAssay Diagnostics commercial kits (Ankara, Turkey).
All data will be compared between baseline and 6-month follow-up using appropriate statistical methods.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| LSG Patients | – | Other: Anthropometric Measurements and Dietary AssessmentIndividuals who underwent Laparoscopic Sleeve Gastrectomy (LSG) within the last month at Bursa Yıldırım Doruk Hospital, General Surgery Clinic, and meet the inclusion and exclusion criteria. Participants will be assessed at baseline (shortly after surgery) and at 6-month follow-up. |
Who may qualify
- Ages
- 18 to 50 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
- Study population
- Adult patients who underwent Laparoscopic Sleeve Gastrectomy (LSG) within the last month at Bursa Yıldırım Doruk Hospital, General Surgery Clinic, under the supervision of Assoc. Prof. Dogukan Durak, and who meet the inclusion and exclusion criteria.
Key inclusion criteria (7 listed)
- Having undergone Laparoscopic Sleeve Gastrectomy (LSG) within the last month
- Aged between 18-50 years
- Signing the informed consent form
- Having a Body Mass Index (BMI) of 40 kg/m2 or between 35-40 kg/m2 with obesity-related comorbidities
- No diagnosis of depression
Key exclusion criteria (7 listed)
- Not having undergone Laparoscopic Sleeve Gastrectomy (LSG) or not planning to undergo bariatric surgery
- Not being in the age range of 18-50 years
- Not signing the informed consent form
- Having a Body Mass Index (BMI) greater than 40 kg/m2 or less than 35 kg/m2 without obesity-related comorbidities
- Having a diagnosis of depression
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Anthropometric Measurements and Dietary AssessmentAlso: Biochemical and Hormonal Parameter Analysis, Adult Eating Behavior Scale, 3-Day Dietary Intake RecordAnthropometric measurements (body weight, height, waist and hip circumference, BMI, waist-to-hip ratio), 3-day dietary intake records, Adult Eating Behavior Scale, and biochemical and hormonal parameters (fasting blood glucose, lipid profile, insulin, ghrelin, GLP-1, PYY) will be assessed at baseline and at 6-month follow-up. | Other | LSG Patients |
Primary outcome
Change in Serum Ghrelin Concentration (pg/mL)
Time frame: Baseline and 6 months after surgery
Change in serum ghrelin levels between baseline and 6-month follow-up, assessed by ELISA method.
Change in Serum GLP-1 Concentration (pmol/L)
Time frame: Baseline and 6 months after surgery
Change in serum glucagon-like peptide-1 (GLP-1) levels between baseline and 6-month follow-up, assessed by ELISA method.
Change in Serum PYY Concentration (pg/mL)
Time frame: Baseline and 6 months after surgery
Change in serum peptide YY (PYY) levels between baseline and 6-month follow-up, assessed by ELISA method.
Change in Adult Eating Behavior Scale Total Score (0-100)
Time frame: Baseline and 6 months after surgery
Change in Adult Eating Behavior Scale total score between baseline and 6-month follow-up. Scale is scored between 0-100; higher scores indicate more positive eating behavior attitudes.
Change in Daily Energy Intake (kcal/day)
Time frame: Baseline and 6 months after surgery
Change in daily energy intake assessed by 3-day dietary intake records at baseline and 6-month follow-up. Food portions will be estimated using the Food and Nutrient Photo Catalog. Data will be analyzed using BeBIS 8.2 software and evaluated according to Turkish Dietary Guidelines 2022.
Change in Daily Protein Intake (g/day)
Time frame: Baseline and 6 months after surgery
Change in daily protein intake assessed by 3-day dietary intake records at baseline and 6-month follow-up. Food portions will be estimated using the Food and Nutrient Photo Catalog. Data will be analyzed using BeBIS 8.2 software and evaluated according to Turkish Dietary Guidelines 2022
Change in Daily Carbohydrate Intake (g/day)
Time frame: Baseline and 6 months after surgery
Change in daily carbohydrate intake assessed by 3-day dietary intake records at baseline and 6-month follow-up. Food portions will be estimated using the Food and Nutrient Photo Catalog. Data will be analyzed using BeBIS 8.2 software and evaluated according to Turkish Dietary Guidelines 2022.
Change in Daily Fat Intake (g/day)
Time frame: Baseline and 6 months after surgery
Change in daily fat intake assessed by 3-day dietary intake records at baseline and 6-month follow-up. Food portions will be estimated using the Food and Nutrient Photo Catalog. Data will be analyzed using BeBIS 8.2 software and evaluated according to Turkish Dietary Guidelines 2022.
12 secondary outcomes
Change in Body Weight (kg)
Time frame: Baseline and 6 months after surgery
Change in Body Mass Index (kg/m²)
Time frame: Baseline and 6 months after surgery
Change in Waist Circumference (cm)
Time frame: Baseline and 6 months after surgery
Change in Hip Circumference (cm)
Time frame: Baseline and 6 months after surgery
Change in Waist-to-Hip Ratio
Time frame: Baseline and 6 months after surgery
Change in Fasting Blood Glucose Concentration (mg/dL)
Time frame: Baseline and 6 months after surgery
Change in Total Cholesterol Concentration (mg/dL)
Time frame: Baseline and 6 months after surgery
Change in Triglyceride Concentration (mg/dL)
Time frame: Baseline and 6 months after surgery
Change in HDL Cholesterol Concentration (mg/dL)
Time frame: Baseline and 6 months after surgery
Change in LDL Cholesterol Concentration (mg/dL)
Time frame: Baseline and 6 months after surgery
Change in VLDL Cholesterol Concentration (mg/dL)
Time frame: Baseline and 6 months after surgery
Change in Fasting Insulin Concentration (µIU/mL)
Time frame: Baseline and 6 months after surgery
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 9 Jun 2026.
- BackgroundCelik E, Karabulut E, Bilgic P. Bariatrik Cerrahi Hastalarinda Beslenme ve Davranis Tutumu Olcegi. Bes Diy Derg. 2017;45(2):107-15.
- BackgroundPekcan G, Sanlier N, Bas M, Acar Tek N, Gokmen Ozel H. Turkiye Beslenme Rehberi (TUBER) 2022. Ankara: Hazar Reklamcilik; 2022.
- BackgroundBeslenme Bilgi Sistemleri Paket Programi (BeBIS 8.2). Istanbul: Software NDB; 2015.
- BackgroundMerdol TK. Toplu Beslenme Yapilan Kurumlar icin Standard Yemek Tarifleri. Hatipoglu Yayinlari; 2003.
- BackgroundRakicioglu N, Tek NA, Ayaz A, Pekcan G. Yemek ve Besin Fotograf Katalogu Olcu ve Miktarlar. Nadir Kitap; 2012.
- Background: PubMed 8594834Physical status: the use and interpretation of anthropometry. Report of a WHO Expert Committee. World Health Organ Tech Rep Ser. 1995;854:1-452.
- BackgroundPekcan G. Beslenme Durumunun Saptanmasi. Diyet El Kitabi. Ankara: Hatipoglu Yayinevi; 2013:67-142.
- BackgroundBaltaci G. Obezite ve egzersiz. Saglik Bakanligi Yayinlari, Ankara; 2008.
- BackgroundWorld Health Organization. Prevention and management of the global epidemic of obesity. Report of the WHO Consultation on Obesity. Geneva: WHO; 1997.
- Background: PubMed 27022941Rigamonti AE, Bini S, Rocco MC, Giardini V, Massimini D, Crippa MG, Saluzzi A, Casati M, Marazzi N, Perotti M, Cimino V, Grassi G, Sartorio A, Pincelli AI. Post-prandial anorexigenic gut peptide, appetite and glucometabolic responses at different eating rates in obese patients undergoing laparoscopic sleeve gastrectomy. Endocrine. 2017 Jan;55(1):113-123. doi: 10.1007/s12020-016-0933-6. Epub 2016 Mar 29.
- Background: PubMed 15527644Devlin MJ, Goldfein JA, Flancbaum L, Bessler M, Eisenstadt R. Surgical management of obese patients with eating disorders: a survey of current practice. Obes Surg. 2004 Oct;14(9):1252-7. doi: 10.1381/0960892042386940.
- Background: PubMed 16894430Brown W, Dixon JB, Brien PO. Management of obesity--the role of surgery. Aust Fam Physician. 2006 Aug;35(8):584-6.
- Individual participant dataSharing planned: No. Individual participant data will not be shared due to patient privacy and confidentiality concerns in accordance with Turkish Personal Data Protection Law (KVKK). Aggregate study results will be made available through peer-reviewed publication.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Özlem ÖZPAK AKKUŞ, Assoc. Prof. principal investigator
Toros University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Obesity and Bariatric Surgery, run by Özlem ÖZPAK AKKUŞ at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 7 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 9 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Özlem ÖZPAK AKKUŞ, Assoc. Prof. (+903246253300, dytozlemozpak@hotmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Serum Ghrelin Concentration (pg/mL) (time frame: Baseline and 6 months after surgery). The study lists 8 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07636239, which also lists 14 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Jun 2026.