Morbidly Obese vs Nonobese Aseptic Revision Total Hip Arthroplasty: Surprisingly Similar Outcomes

We aimed to compare the outcomes between matched morbidly obese (BMI ≥ 40 kg/m²) and nonobese (BMI <30 kg/m²) patients undergoing first-time aseptic revision THA with at least 4 years of follow-up.

Groups were matched 1:1 using sex, age, and date of revision surgery (123 patients in each group).

The overall incidence and risk of complication, reoperation, and re-revision were similar between groups. Morbidly obese patients were more likely to dislocate (odds ratio [OR], 3.3; P = .03), but were less likely to develop polyethylene wear (OR, 0.1; P = .04) and aseptic loosening (OR, 0.3; P = .03).

Quality outcome measures such as hospital readmission were not addressed by this study and could be the basis for future studies. Level of evidence: level III, prognostic study.