December 12, 2017
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Obese, non-obese patients had similar absolute pain, function scores after TKA

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Patients with high BMI who underwent total knee arthroplasty experienced absolute pain and function scores similar to non-obese patients.

Researchers stratified 633 patients who underwent TKA as normal weight (19%), overweight (32%), class-I obese (27%), class-II obese (12%) and class-III obese (9%). Using a piecewise linear model, the association between BMI group and pain and function were assessed with time intervals of baseline to 3 months, 3 months to 6 months and 6 months to 12 months. At 24 months, researchers also assessed the association between BMI group and patient-reported outcomes.

Results showed worse preoperative WOMAC pain and function scores among patients with a higher BMI. However, researchers noted patients with higher BMI also had greater improvement from baseline to 3 months. All BMI groups had similar mean change in pain and function from 3 months to 6 months and from 6 months to 24 months, according to results. Researchers found similar levels of pain, function and satisfaction across all BMI groups at 24 months. – by Casey Tingle

Disclosures: Collins reports he receives grants from NIH. Please see the full study for a list of all other authors’ relevant financial disclosures.