Role of Dietary Habits in Efficacy of Bariatric Surgery - Study A
Bariatric Surgery · Sleeve Gastrectomy · Obesity
What this study involves
The registry does not currently label this study as recruiting. Ask about its status before planning a screening visit.
- Study type
- Observational
- Phase
- Not applicable / not listed
- Age range
- 21 years - 60 years
- Sex eligible
- All sexes
- Healthy volunteers
- Not accepted
- Participants
- 291 Actual
These are starting points, not an eligibility decision. The research team must review the full requirements.
About the research
The purpose of the study is to evaluate how dietary habits in the post-surgical year impact outcomes of bariatric surgery.
Read the full description
The obesity epidemic is a major public health concern with a significant economic burden in the USA. Bariatric surgery is the most effective and durable weight loss treatment, with long-term cardiometabolic health benefits. Among different types of bariatric procedures, sleeve gastrectomy (SG) has become the most commonly performed in USA. While SG is expected to result in a 50-60% excess weight loss, inter-individual differences in weight loss are large and approximately 25% of patients can be considered poor weight-loss responders who either do not lose a substantial amount of weight or regain the lost weight afterwards. The mechanisms underlying this clinical variation remain unknown and interventions to improve on these outcomes critically lacking. Of interest, altered daily dietary habits are experienced by a substantial proportion of bariatric surgery candidates, raising the question whether such alterations may contribute to inter-individual differences in weight loss success. Therefore, the purpose of this study is to evaluate how dietary habits in the post-surgical year impact outcomes of bariatric surgery.
Who may be able to participate?
The list below is the sponsor’s full registry wording. It can include conditions, prior treatment, test results and other requirements. A match in search does not mean you qualify.
Inclusion Criteria:
- Bariatric surgery (sleeve gastrectomy) patients
Exclusion Criteria:
- Prior bariatric surgical procedures
Study population
Patients electing to undergo sleeve gastrectomy.
Understand screeningTreatment, groups and participation
The registry may describe treatments and study duration without a complete visit calendar. Ask the study team for the exact schedule, procedures, risks, costs and alternatives. Keep your usual care plan unless your treating clinician tells you otherwise.
- Assignment
- Not reported
- Masking
- Not reported
Sleeve gastrectomy patients
Patients electing to undergo sleeve gastrectomy will monitor their dietary habits.
Other: Dietary habits
Dietary habits OTHER
Sleeve gastrectomy patients will be asked to monitor dietary habits before surgery and at 2, 6, and 12 months after surgery.
What researchers are measuring
Outcome measures describe what is being studied. They are not proof that a treatment works.
Primary measures
Percentage Change in Weight at 1-year Post-surgery
Time frame: Baseline and one year
Percentage change in body weight at one year was calculated as \[(weight at one year - baseline weight)/baseline weight\] × 100. Negative values indicate weight loss, whereas positive values indicate weight gain.
Review the complete result tables and limitations in the official record.
Open official results ↗Research locations (1)
The overall study status and a local site’s status can differ. Confirm that location’s availability before traveling.
1 locations
Brigham and Women's HospitalBoston, Massachusetts, United StatesStatus unknown
Study team and timeline
- Lead sponsor
- Brigham and Women's Hospital
- Study start
- Dec 6, 2018 Actual
- Primary completion
- Mar 1, 2025 Actual
- Study completion
- Mar 1, 2025 Actual
- First posted
- Mar 20, 2018 Actual
- Last updated
- Nov 10, 2026 Actual
Official study contacts
No central contact is listed. Check the locations and the official record.
Official study title
Role of Dietary Habits in Efficacy of Bariatric Surgery - Study A
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Source: ClinicalTrials.gov API v2. Information is submitted by sponsors and investigators. NLM does not approve the safety or science of all listed studies. Registry disclaimer.
Retrieved: Nov 12, 2026 · Last registry update: Nov 10, 2026