Bariatric Surgical Risk/Benefit Calculator: A Helpful Tool for Patients Considering Bariatric Surgery

When considering bariatric surgery—whether locally or through bariatric tourism—it’s natural to have questions about safety, risks, and potential benefits. One tool designed to provide patients with clearer expectations is the MBSAQIP Bariatric Surgical Risk/Benefit Calculator.

This calculator, developed by the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP), uses data from hundreds of thousands of patients who have undergone bariatric surgery. By entering personal health information such as age, BMI, and existing medical conditions, patients can receive estimates on:

• The chance of surgical complications or mortality

• The likelihood of remission of weight-related conditions (such as diabetes, sleep apnea, or hypertension)

• Expected weight loss and BMI changes after surgery

How Can This Tool Help?

For many patients, especially those considering bariatric tourism, the calculator can serve as a decision-support tool. Here’s how it may help:

• Personalized Insight: Instead of relying only on general statistics, patients receive estimates based on their own health profile.

• Clearer Expectations: It can help you understand potential outcomes, such as how much weight you might lose or whether your type 2 diabetes could go into remission.

• Informed Decision-Making: Patients can use this information when discussing their options with their surgeon, ensuring the conversation is based on realistic expectations.

• Risk Awareness: Understanding the possibility of complications helps patients prepare mentally and logistically, especially when traveling abroad for surgery.

Research has shown that use of the MBSAQIP calculator is associated with a reduction in serious complications (Hetherington et al., 2023), suggesting that informed patients and surgeons may ultimately experience safer outcomes.

Bariatric Surgical Risk/Benefit Calculator

Important Limitations to Keep in Mind

While the calculator is useful, it is not perfect. The creators themselves provide a clear disclaimer, which is important to highlight:

The MBSAQIP Bariatric Surgical Risk/Benefit Calculator estimates the chance of an unfavorable outcome (such as a complication or death), the chance of remission of weight-related comorbidities, and the patient’s BMI, weight change, and percent total weight change after surgery. These quantities are estimated based upon information the patient gives the healthcare provider about prior health history. The estimates are calculated using data from a large number of patients who had a primary bariatric surgical procedure similar to the one the patient may have.

Please note the risk percentages, remission percentages, BMI, weight change, and percent total weight change provided to you by the risk/benefit calculator are only estimates. These estimates only take certain information into account. There may be other factors that are not included in the estimate which may increase or decrease the risk of a complication, the chance of remission of a weight-related comorbidity, or the amount of weight the patient loses. These estimates are not a guarantee of results. A complication after surgery may happen even if the risk is low, a weight-related comorbidity may not go into remission even if the chances are high, and a patient may lose more or less weight than predicted. This information is not intended to replace the advice of a doctor or healthcare provider about the diagnosis, treatment, or potential outcomes. MBSAQIP is not responsible for medical decisions that may be made based on the risk/benefit calculator estimates, since these estimates are provided for informational purposes. Patients should always consult their doctor or other health care provider before deciding on a treatment plan (MBSAQIP, n.d.).

In short, it’s a guide—not a guarantee. It cannot account for every factor (such as surgical technique, hospital standards abroad, or patient adherence to lifestyle changes after surgery).

The Need for Updates: The Rise of GLP-1 Medications

One area where the calculator shows its age is in accounting for new weight-loss medications, such as GLP-1 receptor agonists (e.g., semaglutide, tirzepatide). These drugs have significantly changed the landscape of obesity treatment, and many patients now wonder whether surgery or medication (or a combination) is the right path.

Since the calculator’s estimates are based on historical surgical data, it does not yet integrate these newer treatment options. This highlights the importance of using the tool as just one part of a broader discussion with your healthcare team.

Final Thoughts

The Bariatric Surgical Risk/Benefit Calculator can be a powerful tool for setting expectations and preparing for surgery, especially for patients traveling abroad. It provides personalized information that can guide conversations with your surgeon and help you weigh your options.

However, remember that it is only an estimate. Your individual journey will depend on factors beyond the calculator’s reach, including surgical expertise, hospital quality, aftercare, and your own lifestyle changes. With the rise of effective medications like GLP-1s, ongoing updates to tools like this are essential to give patients the most accurate picture of their choices.

If you’re considering bariatric surgery, use the calculator, but also have an open, honest conversation with your healthcare provider about what’s best for you.

References

• American College of Surgeons. (n.d.). MBSAQIP Bariatric Surgical Risk/Benefit Calculator. Retrieved from https://riskcalculator.facs.org/bariatric
• Grieco, A., Huffman, K. M., Cohen, M. E., Hall, B. L., Morton, J. M., & Ko, C. Y. (2024). Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program: Bariatric Surgical Risk/Benefit Calculator: 1-year comorbidity remission. Surgery for Obesity and Related Diseases, 20(3), 275–282. https://doi.org/10.1016/j.soard.2023.09.020
• Hetherington, A., Verhoeff, K., Mocanu, V., Birch, D. W., Karmali, S., & Switzer, N. J. (2023). MBSAQIP risk calculator use in bariatric surgery is associated with a reduction in serious complications: A retrospective analysis of 210,710 patients. Surgery for Obesity and Related Diseases, 19(11), 1228–1234. https://doi.org/10.1016/j.soard.2023.05.024