To investigate the effect of obesity on functional outcome following total ankle arthroplasty. We identified 43 obese patients (46 ankles) (BMI > 30kg/m2), using a prospectively collected database of total ankle arthroplasties. Inclusion criteria included: (a) Post-traumatic or inflammatory arthritis; (b) Minimum two-year follow-up, (c) Coronal plane deformity less than 10 degrees. Exclusion criteria: (a) Co-morbidity affecting physical function; (b) Recent total joint arthroplasty. American Orthopaedic Foot and Ankle Society (AOFAS), Ankle Osteoarthritis Scale (AOS) and SF-36 questionnaires were used preoperatively and at latest follow-up. Revision was defined as any intervention requiring replacement of part or whole of the prosthesis. A control group of non-obese individuals (BMI 18.5–29.9kg/m2) was devised matching for age within 10 years, gender, diagnosis, implant and length of follow-up (within 1 year). From the original group of 46 ankles, we matched 28 ankles, thereby constructing two groups for comparison (matched obesity and control).Purpose
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