Table 2 Group comparison

Age (years)

39.62 ± 15.78

45.86 ± 14.49

0.211 ^a

Gender (male/female)

6/7

6/1

0.158 ^b

Combined anterior incision (n)

12 (92.3%)

7 (100%)

1.000 ^b

Combined adjuvant radiotherapy (n)

8 (61.5%)

6 (85.7%)

0.354 ^b

Operation time (minutes)

115.00 ± 43.83 (PL only: 40; Anterior + PL: 100; Anterior + PM: 180; Anterior + PM + PL: 117.50 ± 37.88)

184.57 ± 68.59

0.019 ^a,c

Blood loss (ml)

18.46 ± 11.97 (PL only: 5; Anterior + PL: 10; Anterior + PM: 20; Anterior + PM + PL: 20.50 ± 12.57)

47.14 ± 33.52

0.109 ^a,c

Postoperative WOMAC

91.23 ± 7.20 (75–99)

76.00 ± 16.57 (48–98)

0.037 ^a

Postoperative MSTS

24.23 ± 2.68 (20–28)

22.43 ± 4.69 (14–27)

0.485 ^a

Recurrence (n)

2 (15.4%)

2 (28.6%)

0.587 ^b

Preoperative active ROM of the knee (degree)

104.23 ± 16.56

93.57 ± 28.09

0.438 ^a

Preoperative extension (degree)

1.54 ± 3.76

0 ± 0

0.588 ^a

Preoperative flexion (degree)

105.77 ± 14.41

93.57 ± 28.09

0.351 ^a

Postoperative active ROM of the knee (degree)

122.31 ± 14.52

100.71 ± 23.53

0.046 ^a

Postoperative extension (degree)

2.31 ± 4.39

4.29 ± 5.35

0.485 ^a

Postoperative flexion (degree)

124.62 ± 12.98

105.00 ± 19.37

0.025 ^a

Postoperative ROM > 120° flexion (n)

9 (69.2%)

3 (42.9%)

0.356 ^b