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

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.