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Table 1 Demographic characteristic of included patients

From: The accelerometer-based navigation system demonstrated superior radiological outcomes in restoring mechanical alignment and component sagittal positioning in total knee arthroplasty

 

Unmatched group

P value

Propensity-matched group

P value

ABN group

CON group

ABN group

CON group

Number of cases/ knees

27/33

274/299

 

21/24

77/78

 

Age (years)

70.52 ± 6.50

69.36 ± 7.00

0.368

71.04 ± 6.75

69.18 ± 7.33

0.270

Gender (female)

31 (93.9%)

234 (78.3%)

0.033*

22 (91.7%)

68 (87.2%)

0.727

Knee (right)

16 (48.5%)

122 (40.8%)

0.507

10 (41.7%)

35 (44.9%)

0.967

Prosthesis type

  

0.040*

  

0.137

 LPS-Flex

29 (87.9%)

198 (66.2%)

 

21 (87.5%)

51 (65.4%)

 

 Legion PS

2 (6.1%)

53 (17.7%)

 

1 (4.2%)

14 (17.9%)

 

 Attune PS

2 (6.1%)

48 (16.1%)

 

2 (8.3%)

13 (16.7%)

 

BMI (kg/m2)

27.12 ± 2.87

26.88 ± 3.72

0.718

27.80 ± 2.85

27.40 ± 3.54

0.615

KSKS

42.24 ± 14.75

40.41 ± 16.17

0.534

40.79 ± 15.21

39.79 ± 16.26

0.790

KSFS

46.06 ± 22.94

52.93 ± 20.75

0.075

46.46 ± 19.31

49.88 ± 20.97

0.478

ROM (°)

95.15 ± 18.94

95.20 ± 19.90

0.989

95.83 ± 18.51

93.08 ± 22.15

0.582

MA (°)

4.38 ± 11.87

9.50 ± 11.87

0.021*

7.80 ± 8.76

8.04 ± 6.13

0.882

FU time (month)

21.79 ± 1.65

21.99 ± 8.03

0.754

21.88 ± 1.42

21.56 ± 8.66

0.725

  1. Abbreviations: BMI Body mass index, ROM Range of motion, KSKS Knee society knee score, KSFS Knee society function score, MA Mechanical axis (neutral MA = 0°, valgus = negative, varus = positive), FU Follow-up
  2. P value < 0.05 were strengthened by *