Which weight-loss surgery works best?

Study shows which procedure is tied to most kilograms lost

People who have weight-loss surgery for extreme obesity may lose more weight with Roux-en-Y gastric bypass (RYGB) than with sleeve gastrectomy, a small US study suggests.

Researchers followed 59 obese patients who had sleeve gastrectomy operations between 2006 and 2009 and compared these patients to a similar group of severely obese or high-risk surgical patients who had RYGB.

After seven years, both types of surgery were associated with lasting weight loss, as well as reductions in obesity-related health problems, such as diabetes, high blood pressure and elevated cholesterol, the study finds.

But sleeve gastrectomy was tied to less weight loss: 24% vs 30% with RGYB.

"For those higher-risk bariatric surgical patients, it would be reasonable for them to consider that a RYGB may be a better choice than a sleeve gastrectomy, especially if longer-term weight loss is an important goal,"

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