Risks of chronic steroid or immunosuppressive therapy on total shoulder arthroplasty patients

Introduction: Patients on chronic corticosteroids/immunosuppressants (SI) undergoing orthopaedic surgery are at an increased risk for surgical complications and worse outcomes. However, whether or not chronic preoperative SI use increases the risk for 30-day complications in patients undergoing primary total shoulder arthroplasty (SA) has yet to be explored. Methods: From 2006 to 2019, the National Surgical Quality Improvement Program (NSQIP) database was used to identify all patients who underwent primary SA (anatomic TSA and reverse TSA). Patients were stratified into two cohorts: chronic preoperative SI users and those without use. Bivariate and multivariate analyses were utilized in this study. Results: Of the 26,979 patients who underwent primary SA, 25,656 (95.1%) patients did not have SI usage whereas 1323 (4.9%) patients had chronic preoperative SI usage. Following adjustment on multivariate analyses, compared to the non-SI usage cohort, patients who used SI had an increased risk of urinary tract infections (UTIs) (OR 1.87; p = 0.009) and septic shock (OR 7.14; p = 0.002). There were no differences in mortality between the two cohorts (p = 0.058). Discussion and Conclusion: Chronic pre-operative SI use is an independent risk factor for septic shock and UTIs following primary SA. Surgeons and patients should be aware of these risks to better inform patient counseling and surgical decision making.