Patient-Physician Racial Concordance Increases Likelihood of Total Knee Arthroplasty Recommendation.

Background: Minority patients have been shown to underutilize total knee arthroplasty (TKA) compared to non-Hispanic White (NHW) patients. Specific drivers of this underutilization have not been identified. We sought to determine if racial concordance between patient and physician is associated with the surgeon's likelihood to recommend TKA.

Methods: There were 402 patients who presented for management of knee osteoarthritis to the clinics of four fellowship-trained arthroplasty surgeons at a single academic center. We recorded the patient and surgeon's race/ethnicity as well as the physician-recommended treatment. Patient clinical data was input to the American Academy of Orthopaedic Surgeons (AAOS) Appropriate Use Criteria (AUC) website to generate a guideline-based procedure recommendation for TKA. Patients who were not appropriate for TKA based on AAOS guidelines were excluded from analyses to minimize selection bias. Chi-square and multivariable regression analyses evaluated the relationship between TKA recommendation by surgeon and physician-patient racial concordance.

Results: Patients in this cohort who experienced racial concordance with their surgeon were more likely to receive a recommendation for TKA than patients who experienced racial discordance. Black patients who received racially concordant care were more likely to be offered surgery compared to those who received racially discordant care (55.1 versus 23.0%, P = 0.0001). The same effect was not observed in NHW patients, where there was no significant difference in surgery offers between patients who received concordant versus discordant care (P = 0.18). Multivariable analyses were also conducted to test factors associated with TKA recommendations. Racial concordance was found to be an independent predictor of TKA recommendation while controlling for patient factors and individual differences by the surgeon.

Conclusion: Patients receiving racially concordant care in this cohort were more likely to be offered TKA, and the effect of racial concordance on TKA recommendation was greater among Black patients. These findings provide insight into possible drivers of TKA underutilization among minority groups.