Table 5.

Mean length of stay by primary rTKA indication.

Indication	2012	2013	2014	2015	2016	2017	2018	2019	Total
Loosening	3.31 (0.04)	3.21 (0.04)	3.07 (0.04)	2.92 (0.04)	2.78 (0.03)	2.62 (0.04)	2.49 (0.04)	2.42 (0.04)	2.81 (0.01)
PJI	6.52 (0.15)	6.02 (0.11)	6.42 (0.14)	6.6 (0.15)	6.18 (0.12)	6.04 (0.1)	6.31 (0.1)	6.5 (0.12)	6.33 (0.04)
Instability	3.31 (0.08)	3.13 (0.07)	3.03 (0.07)	2.99 (0.08)	2.58 (0.06)	2.6 (0.07)	2.37 (0.05)	2.39 (0.06)	2.71 (0.02)
Bearing surface wear	3.13 (0.1)	2.75 (0.09)	2.73 (0.1)	2.41 (0.1)	2.42 (0.08)	2.23 (0.09)	2.07 (0.08)	2.03 (0.12)	2.47 (0.03)
Periprosthetic fracture	6.46 (0.45)	5.79 (0.29)	5.58 (0.31)	6.94 (0.45)	5.64 (0.5)	6.24 (0.29)	6.63 (0.32)	6.77 (0.25)	6.39 (0.12)
Osteolysis	3.49 (0.18)	3.37 (0.17)	2.79 (0.12)	3.32 (0.33)	2.82 (0.15)	2.97 (0.27)	2.37 (0.15)	2.0 (0.16)	2.96 (0.08)
Breakage	3.62 (0.22)	3.46 (0.2)	3.49 (0.25)	3.48 (0.29)	3.07 (0.17)	2.75 (0.16)	2.61 (0.16)	2.66 (0.18)	3.08 (0.07)
Other	3.26 (0.04)	3.13 (0.03)	3 (0.03)	2.82 (0.03)	2.59 (0.03)	2.51 (0.04)	2.36 (0.04)	2.27 (0.04)	2.8 (0.01)
Missing	4.19 (0.08)	4.24 (0.1)	4.05 (0.08)	3.91 (0.08)	3.92 (0.09)	3.64 (0.08)	3.47 (0.08)	3.69 (0.12)	3.88 (0.03)
Total	3.96 (0.03)	3.82 (0.03)	3.79 (0.03)	3.77 (0.04)	3.56 (0.03)	3.49 (0.03)	3.54 (0.03)	3.78 (0.04)	3.71 (0.01)

Standard error in parentheses.