Measuring Drinking Behaviour After Weight-Loss Surgery for Obesity
Studies how drinking habits change after bariatric surgery in adults with obesity.
Plain-language title generated from the registry record
Registry title: Direct Measurement of Ingestive Behaviour in Relation to Sex Differences and Gastrointestinal Hormone Levels in Patients After Metabolic and Bariatric Surgery
Key facts
- Where
- Männedorf and Zurich, SwitzerlandSee the 2 sites
Where in Switzerland
- Hospital MännedorfMännedorf, SwitzerlandTaking people
- University Hospital Zurich, Department of Surgery and TransplantationZurich, SwitzerlandTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- University of Zurich
- Trial code
- NCT06538948
- Record updated
- 18 May 2026
- Original description
Bariatric surgery (BS), especially procedures like Sleeve Gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB), is the most effective treatment for obesity. Yet, the exact mechanisms governing its effect are somewhat elusive, with current research mainly focusing on post-operative food intake outcomes based on self-reported data, which might not fully capture the nuanced changes in eating behaviours.Read full original descriptionShow less
Direct Measurement of Ingestive Behaviour in Relation to Sex Differences and Gastrointestinal Hormone Levels in Patients After Metabolic and Bariatric Surgery
Bariatric surgery (BS), especially procedures like Sleeve Gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB), is the most effective treatment for obesity. Yet, the exact mechanisms governing its effect are somewhat elusive, with current research mainly focusing on post-operative food intake outcomes based on self-reported data, which might not fully capture the nuanced changes in eating behaviours.
To address these gaps, our study plans to employ the newly developed "drinkometer", a device capable of analysing the intricate changes in drinking behaviour following BS. This tool promises to bring a more detailed perspective to the changes in ingestive behaviours, bypassing the inaccuracies of self-reporting methods. By expanding our research to encompass diverse patient demographics and examining potential links to physiological shifts like gut hormone level alterations, the study aims to provide a more rounded understanding of the long-term impacts of BS on eating behaviours.
Inclusion: Age ≥ 18 year; BMI ≥ 35 kg/m2 for patients with planned RYGB or SG operation; BMI ≥ 30 kg/m2 for external controls affected by obesity but no planned RYGB or SG within the next 12 months, and; BMI ≥ 18.5 kg/m2 and ≤ 24.9 kg/m2 for controls without obesity.
Exclusion: history of previous bariatric operations and/ or revisional surgery (e.g., alteration of limb lengths after primary RYGB),; established diagnosis of type 1 or 2 diabetes mellitus, and; polycystic ovary syndrome (PCOS); smoking,.