The Journal of Arthroplasty
Inpatient Revision Total Knee Arthroplasty Has a Higher Risk of Early Complications: A Propensity Score-Matched Analysis with Outpatient Revision Total Knee Arthroplasty
Kevin D. Plancher, MD, MPH a, b, c, d, *, Carlo M. Mannina, BA c,
Elias N. Schwartz, BS c, Karen K. Briggs, MPH c,
Stephanie C. Petterson, MPT, PhD d
(TKA) as an outpatient procedure has been questioned. This study compared surgical outcomes and complications of inpatient versus outpatient revision TKA using a large national database. Methods: The database was queried for patients who underwent outpatient and inpatient revision TKA. Groups were propensity-matched by age, sex, one or two-component revision, and the Elixhauser Comorbidity Index, resulting in 7,728 patients per group. Outcome measures included 2-year re-revision, 90-day hospital readmission, manipulation under anesthesia, and 6-month medical complications. Queries were based on Current Procedural Terminology and International Classification of Diseases codes. Binomial logistic regressionwas used to determine predictors of failure.