Patient Factors Associated With Reimplantation After Girdlestone Resection Arthroplasty for Treatment of Periprosthetic Joint Infections of the Hip.

ABSTRACT

INTRODUCTION: For patients unsuitable for prosthesis reimplantation or temporary spacer placement, Girdlestone resection arthroplasty (GRA) is a suitable option to eliminate infection. Using a large-scale database, this study aims to determine factors associated with reimplantation. METHODS: This study included patients who underwent GRA and subsequent total hip arthroplasty (2012 to 2015 Medicare Limited Data Set with ≥5-year follow-up). A mixed-effects model measured associations between patient characteristics and reimplantation. Odds ratios (OR) with 95% confidence intervals (CI) were reported. RESULTS: Among 2,772 GRA cases, 2,025 (73.1%) were reimplanted (median time to reimplantation 3.0 months). In multivariable analysis, patient factors associated with reduced odds of reimplantation were increased age (OR 0.96; CI, 0.94 to 0.97; P < 0.0001), Black race (OR, 0.58; CI, 0.37 to 0.90; P = 0.0149), obesity (OR, 0.74; CI, 0.58 to 0.94; P = 0.0150), and increased Deyo-Charlson comorbidities (1 comorbidity OR, 0.78; CI, 0.61 to 0.99; P = 0.0453; two comorbidities OR, 0.53; CI, 0.39 to 0.71; P < 0.0001; ≥3 comorbidities OR, 0.69; CI, 0.49 to 0.95; P = 0.0244). Male (versus female) patients, however, had increased odds of reimplantation (OR, 1.64; CI, 1.32 to 2.02; P < 0.0001). DISCUSSION: Age, race, and comorbidities influence the likelihood of reimplantation after GRA. Owing to variability in patients who undergo additional surgery, additional studies should be conducted to determine the rationale of patient selection.