Table 3 PROMs of patients given as mean with standard deviation. p-values: ¹ Non allergy patients receiving standard TKA vs. non-allergy patients receiving coated TKA. ² Allergy group vs. coated non-allergy group (all patients, Chi²-Test). ³ Allergy group vs. matched-pair group (Mann-Whitney U-Test)

Oxford Knee Score [0–48]

prior to surgery

20.7 ± 7.5

22.6 ± 7.4

0.296

23.3 ± 8.8

0.634

19.0 ± 7.6

0.293

1 year follow-up

38.5 ± 7.7

37.1 ± 6.7

0.417

27.5 ± 5.6

0.669

35.4 ± 6.3

0.635

3 year follow-up

38.5 ± 8.1

37.9 ± 8.0

0.748

36.1 ± 7.0

0.296

36.8 ± 8.4

0.223

KSS Knee Score [0–100]

prior to surgery

40.0 ± 17.8

41.4 ± 17.7

0.742

42.3 ± 14.4

0.562

38.6 ± 16.5

0.563

1 year follow-up

88.9 ± 11.9

85.7 ± 12.9

0.294

76.9 ± 10.6

0.044

85.0 ± 13.7

0.187

3 year follow-up

86.5 ± 12.4

86.0 ± 14.8

0.868

91.1 ± 9.7

0.053

85.4 ± 14.7

0.751

KSS Function Score [0–100]

prior to surgery

54.1 ± 17.2

56.8 ± 16.3

0.501

56.3 ± 19.2

0.855

50.6 ± 17.4

0.456

1 year follow-up

74.1 ± 19.1

83.8 ± 13.7

0.016*

75.0 ± 22.0

0.334

83.8 ± 15.1

0.420

3 year follow-up

71.7 ± 26.5

80.0 ± 21.6

0.154

82.5 ± 23.1

0.611

85.0 ± 14.1

0.914

EuroQol Visual Analogue Scale [0–100]

prior to surgery

55.9 ± 18.2

52.9 ± 13.2

0.424

41.4 ± 15.4

0.038

42.5 ± 13.9

0.705

1 year follow-up

71.0 ± 19.1

78.4 ± 11.7

0.057

55.0 ± 21.2

0.405

80.0 ± 12.2

0.347

3 year follow-up

69.5 ± 21.7

75.2 ± 16.6

0.214

74.6 ± 11.8

0.044

79.4 ± 14.0

0.048

Subjective Satisfaction [0–10]

1 year follow-up

8.5 ± 1.7

8.3 ± 2.0

0.664

8.3 ± 1.5

0.565

8.1 ± 2.7

0.667