Obesity is a growing global public health problem, and bariatric surgery is currently the most effective treatment for achieving sustained weight loss and improving obesity-related comorbidities. However, a subset of patients experience inadequate weight loss or weight regain following primary bariatric surgery, which may lead to the recurrence of metabolic complications and reduced quality of life. In such cases, conversion bariatric surgery, defined as the surgical conversion from one bariatric procedure to another, is considered an important therapeutic option. Despite the increasing number of conversion procedures, comprehensive longitudinal data evaluating anthropometric, biochemical, and nutritional outcomes after conversion bariatric surgery remain limited. This study aims to prospectively evaluate individuals undergoing conversion bariatric surgery due to weight regain following primary bariatric surgery. Anthropometric measurements, biochemical parameters, and nutritional status will be assessed preoperatively and at 1 year after surgery. By evaluating weight loss outcomes together with metabolic and nutritional changes, this study seeks to provide clinically relevant evidence to guide postoperative follow-up strategies, optimize nutritional management, and support multidisciplinary care in patients undergoing conversion bariatric surgery.
Age range
18 Years – 65 Years
Sex
ALL
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The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Change in Body Composition Parameters
Timeframe: Preoperative baseline and postoperative 1 year
Change in Body Weight
Timeframe: Preoperative baseline and postoperative 1 year
Change in Body Mass Index (BMI)
Timeframe: Preoperative baseline and postoperative 1 year
Percentage of Total Weight Loss
Timeframe: postoperative 1 year
Percentage of Excess Weight Loss
Timeframe: postoperative 1 year
Change in Waist Circumference
Timeframe: Preoperative baseline and postoperative 1 year
Change in Hip Circumference
Timeframe: Preoperative baseline and postoperative 1 year
Change in Body Fat Percentage (%)
Timeframe: Preoperative baseline and postoperative 1 year
Change in Fat-Free Mass (kg)
Timeframe: Preoperative baseline and postoperative 1 year
Change in Skeletal Muscle Mass (kg)
Timeframe: Preoperative baseline and postoperative 1 year