Does body mass index affect the outcome of unicompartmental knee replacement?

作者：Murray D W^*; Pandit H; Weston Simons J S; Jenkins C; Gill H S; Lombardi A V; Dodd C A F; Berend K R

来源：Knee, 2013, 20(6): 461-465.

DOI：10.1016/j.knee.2012.09.017

• Unicompartmental knee replacement
• Outcomes
• Obesity

Background: Obesity is considered to be a contraindication for unicompartmental knee replacement (UKR). The aim was to study the impact of BMI on failure rate and clinical outcome of the Oxford mobile bearing UKR. %26lt;br%26gt;Method: Two thousand four hundred and thirty-eight medial Oxford UKRs were studied prospectively and divided into groups: BMI%26lt;25 (n=378), BMI 25 to %26lt;30 (n=856), BMI 30 to %26lt;35 (n=712), BMI 35 to %26lt;40 (n=286), and BMI 40 to %26lt;45 (n=126) and BMI %26gt;= 45 (n=80). %26lt;br%26gt;Results: There was no significant difference in survival rate between groups. At a mean follow-up of 5 years (range 1-12 years) there was no significant difference in the Objective American Knee Society Score between groups. There was a significant (p%26lt;0.01) trend with the Oxford Knee Score (OKS) and Functional American Knee Society Scores decreasing with increasing BMI. As there was an opposite trend (p%26lt;0.01) in pre-operative OKS, the change in OKS increased with increasing BMI (p=0.048). The mean age at surgery was significantly (p%26lt;0.01) lower in patients with higher BMI. %26lt;br%26gt;Conclusions: Increasing BMI was not associated with an increasing failure rate. It was also not associated with a decreasing benefit from the operation. Therefore, a high BMI should not be considered a contra-indication to mobile bearing UKR.

• 出版日期2013-12