Inhospital Complications and Mortality of Patients Undergoing Primary Unilateral, Bilateral, and Revision Total Knee Arthroplasty: A Study of 4169489 Hospital Discharges in the United States Between 1990 and 2004

It has been suggested that patients undergoing bilateral total knee arthroplasty (BTKA) have a higher complication rate and mortality than those undergoing a unilateral procedure (UTKA). We analyzed nationally representative data to elucidate the demographics, comorbidities, hospital stay, inhospital complications, and mortality of patients undergoing BTKA and compared them with those of patients undergoing UTKA and revision TKA (RTKA).