Table 2 Surgical complications in TKA with and without spinal fusion. TKA, total knee arthroplasty; SF, spinal fusion

Mechanical loosening, n (%)

1 year

27 (0.3%)

38 (0.4%)

0.21

2 years

55 (0.6%)

76 (0.9%)

0.08

3 years

80 (0.9%)

107 (1.2%)

0.06

Prosthetic dislocation, n (%)

1 year

15 (0.2%)

14 (0.2%)

1.00

2 years

37 (0.4%)

34 (0.4%)

0.81

3 years

65 (0.7%)

55 (0.6%)

0.41

Periprosthetic fractures, n (%)

1 year

 < 10

 < 10

1.00

2 years

11 (0.1%)

11 (0.1%)

1.00

3 years

23 (0.3%)

22 (0.2%)

1.00

Stiffness, n (%)

1 year

59 (0.7%)

12 (0.1%)

 < 0.001

2 years

109 (1.2%)

44 (0.5%)

 < 0.001

3 years

147 (1.7%)

65 (0.7%)

 < 0.001

Lysis of adhesions (%)

1 year

 < 10

 < 10

0.68

2 years

13 (0.1%)

 < 10

0.17

3 years

16 (0.2%)

12 (0.1%)

0.57

Manipulation under anesthesia, n (%)

1 year

48 (0.5%)

17 (0.2%)

 < 0.001

2 years

98 (1.1%)

54 (0.6%)

 < 0.001

3 years

141 (1.6%)

83 (0.9%)

 < 0.001

Revision, n (%)

1 year

21 (0.2%)

32 (0.4%)

0.17

2 years

61 (0.7%)

76 (0.9%)

0.23

3 years

104 (1.2%)

114 (1.3%)

0.54