Table 1 Demographic characteristic of patients undergoing TKA with or without the use of ABN

Number of cases

135

69

41

41

Age (years)

66.4 ± 8.7

67.3 ± 7.6

0.847

0.347

67.7 ± 7.1

67.9 ± 7.3

0.021

0.826

Gender (female)

114

60

–

–

39

39

BMI (kg/m²)

25.9 ± 2.7

27.3 ± 3.2

0.270

0.160

26.6 ± 1.5

26.8 ± 2.6

0.149

0.32

HKA (°)

174.4 ± 10.6

175.5 ± 10.2

0.106

0.491

175.1 ± 7.7

175.4 ± 8.4

0.038

0.711

 KS Knee Score

37.6 ± 17.1

40.8 ± 15.7

0.249

0.296

38.8 ± 14.2

39.6 ± 14.1

0.088

0.673

 KS function Score

48.3 ± 17.8

51.4 ± 14.5

0.747

0.169

49.3 ± 8.7

50.6 ± 12.7

0.125

0.672

 Pain

9.6 ± 4.3

8.7 ± 4.3

0.091

0.257

9.1 ± 3.9

8.9 ± 3.3

0.033

0.837

 Stiffness

5.3 ± 1.7

4.9 ± 2.1

0.142

0.571

4.9 ± 1.5

4.8 ± 1.4

0.063

0.952

 Function

40.7 ± 14.2

38.8 ± 15.1

0.237

0.771

39.2 ± 10.9

38.1 ± 11.1

0.051

0.923

 Total

55.1 ± 11.4

51.8 ± 8.5

0.473

0.227

51.4 ± 9.2

50.9 ± 8.4

0.021

0.876

Follow-up (mouth)

23.7 ± 7.9

20.8 ± 6.7

–

0.327

20.9 ± 5.2

21.2 ± 5.3

–

0.609