Table 2 Comparison between Attune mobile-bearing (MB) and Attune fixed-bearing (FB) before surgery and after a two-year follow-up examination. Results presented as mean and standard deviation. The p-value was set as p > 0.05

Pre-operative

100.7 ± 14.5

104.4 ± 18.3

p = 0.081

Post-operative

114.0 ± 10.1

109.2 ± 7.2

p = 0.012

Change in ROM

13.3 ± 18.4

4.9 ± 18.4

p = 0.017

Pre-operative

56.9 ± 9.3

58.7 ± 15.4

p = 0.099

Post-operative

92.6 ± 10.3

94.2 ± 5.8

p = 0.645

Change in KSS pain

35.7 ± 13.5

35.5 ± 16.4

p = 0.386

Pre-operative

47.2 ± 13.3

48.5 ± 13.7

p = 0.871

Post-operative

83.1 ± 20.5

86.5 ± 16.8

p = 0.601

Change in KSS function

35.9 ± 24.4

38.0 ± 18.6

p = 0.790

Pre-operative

57.7 ± 10.9

51.0 ± 13.8

p = 0.033

Post-operative

86.1 ± 14.9

90.3 ± 9.5

p = 0.386

Change in WOMAC

28.3 ± 17.1

39.3 ± 14.5

p = 0.018

Pre-operative

6.6 ± 2.0

7.2 ± 1.8

p = 0.161

Post-operative

1.7 ± 1.4

1.6 ± 1.0

p = 0.973

Change in VAS

4.8 ± 2.5

5.6 ± 2.0

p = 0.224