Impact of antibiotic prophylaxis courses on postoperative complications following total joint arthroplasty: Finding from Chinese population.

WHAT IS KNOWN AND OBJECTIVE Prolonged antibiotic prophylaxis after total joint arthroplasty (TJA) may not assist in minimizing postoperative complications, however, data based on the Chinese population have been limited. The purpose of this study is to investigate the effect of antibiotic prophylaxis on postoperative complications after TJA in Chinese patients. METHODS We retrospectively reviewed 990 patients undergoing elective primary TJA surgery from January 2016 to June 2019. Patients who received a short course (≤3 days) of antibiotic prophylaxis were compared with those who received a longer course (>3 days). Logistic regression analysis and subgroup analysis were performed to control for potential confounders. Beyond that, survival analysis was used to determine the cumulative incidence of postoperative complications. RESULTS AND DISCUSSION Follow-up to 12 months after surgery, the prevalence of system complications in the longer course group and the short course group were 5.1% and 3.9%, respectively (p = 0.451). Similarly, no statistical differences in incisional complications (1.5% vs. 1.8%, p > 0.999) and periprosthetic joint infection (PJI) (1.0% vs. 1.0%, p > 0.999) were observed between the two groups. After performing logistic regression analysis and survival analysis, no potential association was found between the course of antibiotic prophylaxis and postoperative complications. In addition, prolonged antibiotic prophylaxis conferred no benefit for high-risk obese patients. WHAT IS NEW AND CONCLUSION Extended antibiotic prophylaxis did not result in a statistically significant and clinically meaningful reduction in postoperative complications. Therefore, we recommended that the duration of antibiotic prophylaxis in TJA should be shortened to 3 days or less in the Chinese population.