Table 2

Incidence of complications with various LOS (per 100 patients), OR analysis, and propensity score matching (PM) analysis of complications in total knee arthroplasty (TKA)

LOS 0LOS 1P value†LOS 2–3P value*TKA/Single variable regressionTKA/Multi-variable regressionTKA/PM/Incidence (%)*
ORP value95% CIORP value95% CILOS 0LOS 1P value
Mortality0.160.080.1230.10.2532.100.1320.80 to 5.511.780.2950.60 to 5.270.140.000.045
Unplanned readmission2.412.310.7492.89<0.0011.040.7490.82 to 1.321.100.4450.86 to 1.422.532.030.211
Major complication0.960.530.0030.640.0061.810.0031.22 to 2.671.940.0011.29 to 2.920.960.320.003
Any complication excluding transfusion2.981.99<0.0012.74<0.0011.51<0.0011.21 to 1.891.55<0.0011.22 to 1.962.921.53<0.001
Any complication4.492.16<0.0016.95<0.0012.13<0.0011.77 to 2.572.03<0.0011.66 to 2.474.421.85<0.001
Systemic infection1.671.280.0701.73<0.0011.310.0710.98 to 1.751.300.0980.95 to 1.791.601.030.061
Wound infection0.770.720.7530.880.0151.070.7530.70 to 1.630.990.9630.61 to 1.590.680.430.207
Cardiac/pulmonary complications0.670.370.0090.440.0231.840.0101.16 to 2.941.950.0071.20 to 3.160.680.250.018
  • *Propensity score matched 2796 patients per group.

  • †Indicates significance.

  • LOS, length of stay.