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FRIDAY, March 24, 2017 (HealthDay News) -- Weight doesn't seem to affect whether a common type of knee surgery will be successful, a new study shows.

About 15 percent of meniscal repair surgeries fail, researchers said. It's been widely believed that patients with a higher body mass index (BMI) are at increased risk for failure because more weight puts more pressure on the knee. BMI is an estimate of body fat based on height and weight.

But this study of 410 patients who had meniscal repair surgery found no significant differences in failure rates between those with a normal BMI of less than 25 (considered normal weight) and those with a BMI of between 25 and 35 (up to 29.9 is overweight, and above 30 is obese).

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