Predicting anemia risk after weight loss surgery

Prediction Model for Anemia After Bariatric Surgery

China-Japan Friendship Hospital · NCT06170749

This study is trying to see if a new tool can help doctors predict which patients with obesity are at risk of developing anemia after weight loss surgery.

Quick facts

Study typeObservational
Enrollment600 (estimated)
Ages16 Years to 70 Years
SexAll
SponsorChina-Japan Friendship Hospital (other)
Locations1 site (Beijing)
Trial IDNCT06170749 on ClinicalTrials.gov

What this trial studies

This observational study aims to develop and validate a prediction model that estimates the risk of anemia in patients with obesity following bariatric surgery, specifically sleeve gastrectomy and Roux-en-Y gastric bypass. By analyzing preoperative clinical and laboratory data, the study will assess the likelihood of developing anemia at one, three, and five years post-surgery. The goal is to provide healthcare providers with a tool to identify patients at higher risk for anemia, allowing for better management and preventive strategies.

Who should consider this trial

Good fit: Ideal candidates for this study are individuals aged 16-70 with a body mass index (BMI) of 27.5 kg/m2 or higher who are undergoing sleeve gastrectomy or Roux-en-Y gastric bypass.

Not a fit: Patients who are vegetarian, have undergone other bariatric procedures, or have renal failure may not benefit from this study.

Why it matters

Potential benefit: If successful, this model could help healthcare providers anticipate and manage anemia in patients after bariatric surgery, improving patient outcomes.

How similar studies have performed: While there have been studies on anemia post-bariatric surgery, this specific predictive modeling approach is relatively novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* aged between 16-70 years;
* body mass index (BMI) ≥ 27.5 kg/m2;
* complete preoperative and follow-up data.

Exclusion Criteria:

* vegetarian;
* other bariatric procedures;
* renal failure at baseline;
* postoperative bleeding (it was defined as a drop in hemoglobin levels \> 3 g/dL or a confirmed blood loss requiring treatment after surgery);
* incomplete preoperative and follow-up data.

Where this trial is running

Beijing

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Anemia, Bariatric Surgery, Bariatric surgery, Prediction model

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.