The Relationship Between Olfactory and Gustatory Senses, Hedonic Hunger, and Diet Quality After Bariatric Surgery
NCT ID: NCT07290075
Last Updated: 2025-12-17
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.
COMPLETED
101 participants
OBSERVATIONAL
2024-01-01
2025-01-31
Brief Summary
Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.
Detailed Description
Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.
Postoperative changes in taste and smell perception are frequently reported by bariatric patients and may influence food preferences, hedonic hunger, and overall diet quality. These sensory alterations can result from anatomical and hormonal changes after surgery, including altered gut hormone secretion (e.g., PYY, GLP-1, ghrelin) and bile acid metabolism, which affect appetite regulation and reward pathways.
This cross-sectional observational study evaluated adults aged 18-65 years who had undergone sleeve gastrectomy (SG) or Roux-en-Y gastric bypass (RYGB) at least three months prior to enrollment. Data collection included sociodemographic and health information, dietary habits, a modified 33-item taste and smell questionnaire, the Power of Food Scale (PFS) to assess hedonic hunger, the Mediterranean Diet Adherence Screener (MEDAS), the International Physical Activity Questionnaire (IPAQ), and anthropometric measurements. Nutrient intakes were analyzed according to the Türkiye Nutrition Guide (TÜBER-2022) reference values.
The primary objective was to determine the relationship between postoperative taste/smell changes and hedonic hunger. Secondary objectives included assessing the association between sensory perception and Mediterranean diet adherence, anthropometric parameters, and nutrient adequacy by surgery type. Findings from this study may guide the development of personalized nutritional follow-up protocols to improve long-term outcomes in bariatric patients.
Conditions
See the medical conditions and disease areas that this research is targeting or investigating.
Keywords
Explore important study keywords that can help with search, categorization, and topic discovery.
Study Design
Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.
COHORT
RETROSPECTIVE
Study Groups
Review each arm or cohort in the study, along with the interventions and objectives associated with them.
Sleeve Gastrectomy (SG)
Participants who underwent sleeve gastrectomy at least 3 months prior to enrollment.
Sleeve Gastrectomy (SG) and Roux-en-Y Gastric Bypass (RYGB)
Participants who have undergone sleeve gastrectomy ≥3 months prior to study enrollment; and Participants who have undergone Roux-en-Y gastric bypass ≥3 months prior to study enrollment.
Roux-en-Y Gastric Bypass (RYGB)
Participants who underwent Roux-en-Y gastric bypass at least 3 months prior to enrollment.
Sleeve Gastrectomy (SG) and Roux-en-Y Gastric Bypass (RYGB)
Participants who have undergone sleeve gastrectomy ≥3 months prior to study enrollment; and Participants who have undergone Roux-en-Y gastric bypass ≥3 months prior to study enrollment.
Interventions
Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.
Sleeve Gastrectomy (SG) and Roux-en-Y Gastric Bypass (RYGB)
Participants who have undergone sleeve gastrectomy ≥3 months prior to study enrollment; and Participants who have undergone Roux-en-Y gastric bypass ≥3 months prior to study enrollment.
Eligibility Criteria
Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.
Inclusion Criteria
* History of bariatric surgery (Sleeve Gastrectomy or Roux-en-Y Gastric Bypass)
* At least 3 months post-surgery at the time of study enrollment
* Able and willing to provide informed consent
Exclusion Criteria
* History of neurological disorders affecting taste or smell
* Active upper respiratory infection at the time of assessment
* Severe psychiatric disorders that may impair participation
18 Years
65 Years
ALL
No
Sponsors
Meet the organizations funding or collaborating on the study and learn about their roles.
Uskudar University
OTHER
Hanife Köksal
OTHER
Responsible Party
Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.
Hanife Köksal
Registered dietitians
Locations
Explore where the study is taking place and check the recruitment status at each participating site.
Istanbul University, Faculty of Medicine, Department of Endocrinology and Metabolism
Istanbul, Capa, Turkey (Türkiye)
Countries
Review the countries where the study has at least one active or historical site.
Other Identifiers
Review additional registry numbers or institutional identifiers associated with this trial.
USK-NUTR-HK01
Identifier Type: -
Identifier Source: org_study_id