Venkatsaiakhil Tirumala - Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
Christian Klemt - Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
John G. Esposito - Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
Matthew G. Robinson - Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
Ameen Barghi - Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
Kwon Young-Min - Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA

Background: The aim of this study is to evaluate the potential effects of insurance payer type on the postoperative outcomes following revision TJA. Methods: A single-institution database was utilized to identify ۴,۳۰۲ consecutive revision THA and TKA. Patient demographics and indications for revision were collected and compared based on patient insurance payer type: (۱) Medicaid, (۲) Medicare, and (۳) private. Propensity score matching and, subsequent, multivariate regression analyses were applied to control for baseline differences between payer groups. Outcomes of interest were rates of complications occurring perioperatively and ۹۰ days post-discharge.Results: After propensity-score-based matching, a total of ۲,۳۲۸ patients remained for further multivariate regression analyses (۳۰۰ [۱۲.۹%] Medicaid, ۱۰۲۲ [۴۳.۹%] Medicare, ۱۰۰۶ [۴۳.۲%] private). Compared to privately insured patients, Medicaid and Medicare patients had ۷۱% (P<۰.۰۱) and ۵۳% (P=۰.۰۳) increased odds, respectively, for developing an in-hospital complication. At ۹۰ days post-discharge, compared to privately insured patients, Medicaid and Medicare patients had ۸۸% and ۴۳% odds, respectively, for developing overall major complications.Conclusion: Our propensity-score-matched cohort study found that, compared to privately insured patients, patients with government-sponsored insurance were at an increased risk for developing both major or minor complications perioperatively and at ۹۰-days post-discharge for revision TJA. This suggests that insurance payer type is an independent risk factor for poor outcomes following revision TJA.Level of evidence: III

clinical outcomes, insurance payer type, Revision surgery, Total Joint Arthroplasty