The Effects of Gout Following total Knee Arthroplasty: A Retrospective Analysis.

BACKGROUND

The prevalence of gout is increasing along with the number of total knee arthroplasties (TKA) performed annually. The purpose of this study was to evaluate the incidence of gout following TKA in patients who had a previous history of gout and to determine if it is associated with an increased rate of postoperative joint complications.

METHODS

Patients who did and did not have a preoperative diagnosis of gout and underwent a primary TKA were identified from a national database. The gout patients were matched 1:1 to patients who did not have gout and rates of postoperative gout diagnoses within 2 years of surgery were compared. Complication rates at mean 1 and 2 years were then compared for both patient cohorts using multivariable logistic regressions. A total of 17,463 patients with a prior diagnosis of gout were matched with 17,463 controls.

RESULTS

There were 53.8% of patients who had previous gout and had a recurrence of gout within 2 years versus 3.6% of controls (Odds Ratios [OR]: 30.86). At mean 1-year, patients who had gout were significantly more likely to experience prosthetic joint infections (PJIs) and revision procedures. At mean 2 years, gout patients were at increased risk of prosthetic loosening, PJI, revision, and incision and debridement procedures.

CONCLUSION

This study suggests that patients who had a prior diagnosis of gout are significantly more likely to experience recurrent episodes of gout after TKA. Gout attacks after TKA are associated with an increase in the rate of joint complications.

LEVEL OF EVIDENCE: Level III.