Inpatient Dislocation after Primary Total Hip Arthroplasty

Abstract Background Inpatient dislocation after total hip arthroplasty (THA) is considered a non-reimbursable “never event” by the Centers for Medicare and Medicaid Services. There is extensive evidence that technical procedural factors affect dislocation risk, but less is known about the influence of non-technical factors. We evaluated inpatient dislocation trends following elective primary THA, and identified patient and hospital characteristics associated with the occurrence of dislocation. Methods We used discharge records from the Nationwide Inpatient Sample (2002-2011). Temporal trends were assessed and multivariable logistic regression modeling was used to identify factors associated with dislocation. Results The in-hospital dislocation rate increased from 0.025% in 2002 to 0.15% in 2011, despite a downward trend in length of stay ( P