Table 4 Comparison of the between-group outcomes

Flexion range of motion (degrees)

Pre-op

92.34±17.62

96.09±21.84

-3.75

0.132

2 years

117.41±6.97

115.89±9.19

1.52

0.139

KOOS pain (100 points)

Pre-op

37.26±14.84

37.20±11.71

0.07

0.969

2 years

90.49±5.57

80.69±10.88

9.8

<0.001

 Symptoms (100 points)

Pre-op

45.51±15.28

46.01±14.72

-0.5

0.789

2 years

83.98±7.07

75.47±10.79

8.51

<0.001

 ADL (100 points)

Pre-op

40.88±13.99

41.96±11.51

-1.08

0.501

2 years

83.72±7.14

72.85±8.47

10.87^a

<0.001

 Sport/Rec (100 points)

Pre-op

12.97±15.38

13.40±15.43

-0.43

0.824

2 years

60.04±15.79

53.36±19.52

6.68

0.003

 QOL (100 points)

Pre-op

18.28±16.19

18.48±14.16

-0.20

0.918

2 years

89.18±13.66

78.24±18.94

10.94

<0.001

NKSS symptom (25 points)

Pre-op

9.55±4.93

9.61±2.64

-0.06

0.912

2 years

22.06±2.27

19.95±3.76

2.12^a

<0.001

 Patient satisfaction (40 points)

Pre-op

18.53±6.29

18.61±6.15

-0.08

0.920

2 years

36.11±2.97

33.53±3.62

2.58^a

<0.001

 Patient expectations (15 points)

Pre-op

10.83±2.62

10.64±2.55

0.19

0.562

2 years

11.77±2.43

10.03±2.42

1.73

<0.001

 Functional activities (100 points)

Pre-op

31.21±15.11

32.16±11.04

-0.95

0.568

2 years

72.54±6.45

64.97±7.25

7.57^a

<0.001

 Total score (180 points)

Pre-op

70.13±23.44

71.02±16.49

-0.89

0.725

2 years

142.48±9.29

128.48±11.90

14.00^a

<0.001

WOMAC pain (100 points)

Pre-op

44.88±15.23

43.83±12.76

1.05

0.549

2 years

93.36±4.35

83.98±9.12

9.38

<0.001

 Stiffness (100 points)

Pre-op

38..67±23.02

36.81±20.56

1.76

0.52

2 years

82.42±11.89

75.59±18.42

6.84

<0.001

 Function (100 points)

Pre-op

40.88±13.99

41.96±11.51

-1.08

0.501

2 years

83.72±7.14

72.85±8.47

10.87^a

<0.001

 Total score (100 points)

Pre-op

41.53±13.1

41.93±10.36

-0.40

0.787

2 years

85.62±5.35

75.40±7.48

10.22^a

<0.001