Plain-English translation of NCT04634591 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
Read our Obesity research guide →The Bialystok Bariatric Surgery Study is tracking how weight loss surgery affects people's health over time. Researchers will measure changes in blood work, metabolism, and weight-related conditions like diabetes and high cholesterol in people who have the surgery, people who don't have it, and people without obesity. The study will follow everyone for up to two years to see which group has the best health outcomes.
Many people with severe obesity struggle to lose weight through diet and exercise alone, and doctors want to understand exactly how weight loss surgery helps improve related health problems like diabetes, high blood pressure, and fatty liver disease. This research will help doctors and patients make better-informed decisions about treatment.
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If you're in the surgery group, you'll have baseline blood tests and health measurements about one month before your weight loss surgery, then return for follow-up visits at 1, 3, 6, 12, and 24 months after surgery to repeat the same tests and measurements. The non-surgery groups (people with obesity who aren't having surgery, and people without obesity) will have the same schedule of visits and tests. All participants should expect routine blood work, physical exams, and measurements related to metabolism and weight-related health conditions.
AI-generated summary from trial data · Jun 19, 2026 · Not medical advice
Poland
Sponsor
Medical University of Bialystok
Collaborators
University of Copenhagen
Enrollment target
~1,000 participants
Started
September 2015
Primary completion
December 2026
Age range
18 Years and older
Last updated on clinicaltrials.gov in April 2026.
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