Outcomes and complications following total hip arthroplasty in the super-obese patient, BMI > 50.

The results of total hip arthroplasty in 42 primary total hip arthroplasties in super-obese patients (BMI ≥ 50) were reviewed. The mean body mass index for the study group was 53.2 kg/m(2) (range 50-64). The mean preoperative Harris hip score improved from 35 to 74.8 postoperatively (P<0.001). Twenty-four of the THAs had at least one complication. At least one major complication occurred in 11 of the THAs and at least one minor complication in 14 THAs When compared to matched 2:1 control group the super-obese patient had a significantly increased risk to experience a complication (HR 5.6 , CI = 2.8-11.0). Caution should be used when proceeding with primary total hip arthroplasty with a BMI greater than 50.