Complications, mortality, and costs for outpatient and short-stay total knee arthroplasty patients in comparison to standard-stay patients

J Arthroplasty. 2014 Mar;29(3):510-5. doi: 10.1016/j.arth.2013.07.020. Epub 2013 Aug 21.


The purpose of the present study is to determine the differences in cost, complications, and mortality between knee arthroplasty (TKA) patients who stay the standard 3-4 nights in a hospital compared to patients who undergo an outpatient procedure, a shortened stay or an extended stay. TKA patients were identified in the Medicare 5% sample (1997-2009) and separated into the following groups: outpatient, 1-2 days, 3-4 days, or 5+ days inpatient. At two years, costs associated with the outpatient and the 1-2 day stay groups were $8527 and $1967 lower than the 3-4 day stay group, respectively. Out to 2 years, the outpatient and 1-2 day stay groups reported less pain and stiffness, respectively, though the 1-2 day group also had a higher risk for revision.

Keywords: complications; costs; mortality; outpatient; short-stay; total knee arthroplasty.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Ambulatory Surgical Procedures / adverse effects*
  • Ambulatory Surgical Procedures / economics
  • Ambulatory Surgical Procedures / mortality
  • Arthroplasty, Replacement, Knee / adverse effects*
  • Arthroplasty, Replacement, Knee / economics
  • Arthroplasty, Replacement, Knee / mortality
  • Costs and Cost Analysis
  • Humans
  • Length of Stay
  • Medicare / statistics & numerical data
  • Postoperative Complications / epidemiology
  • United States / epidemiology