Published literature that examined pre-operative Body Mass Index (BMI) with Total Knee Arthroplasty (TKA) outcomes have shown conflicting data. Some show that higher BMI and is associated with poorer post-TKA function and HRQoL outcomes, but not others. The aim of our analyses is to identify the relationship of pre-operative obesity with the outcomes of TKA, including physical and mental functional limitations. We performed a prospective analysis of a consecutive series of 191 patients, who had underwent TKA from March 2006 to February 2011, performed by a single surgeon, at Singapore General Hospital, Singapore. Patients were eligible if they had met the following criteria: primary, unilateral TKA, using fixed bearing, posterior stabilized prostheses, under computer assisted surgery system. Patients were reviewed clinically at 6 months and 2 years post-operatively. Patients were stratified into non-obese (BMI <30 kg/m2), mildly obese (BMI 30 to 35) and highly obese (BMI ≥35) groups. Outcome measures evaluated include: SF-36, Oxford knee score and Knee Society Score.Introduction
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