Table 7 Between group comparison of the secondary outcome measures at each time point

XSMFA functional index

 Preoperative

35.2 (16.1)

40.5(16.0)

31.4-38.6

36.3-43.7

0.053^a

 6 weeks

21.2 (14.2)

28.5(15.9)

17.8-24.2

23.7-32.3

0.026^a

 3 months

12.7(12.5)

18.8 (16.1)

9.2-14.8

13.7-22.3

0.023^a

 6 months

11.6(12.1)

15.8 (15.4)

8.3-13.7

10.7-19.3

0.094^a

 12 months

10.3(13.0)

15.1 (16.3)

7.3-13.3

10.5-19.5

0.040^a

XSMFA bother index

 Preoperative

48.7 (20.5)

53.0 (17.9)

43.4-52.6

48.8-57.2

0.126^a

 6 weeks

26.6 (19.8)

33.0 (18.3)

21.6-30.5

28.1-37.9

0.055^a

 3 months

19.8 (17.0)

33.0 (18.1)

15.2-22.9

28.1-37.9

0.099^a

 6 months

16.8 (15.8)

25.1 (17.9)

12.4-19.6

20.0-30.0

0.149^a

 12 months

15.8 (18.0)

21.7 (19.6)

10.8-19.1

9.6-20.4

0.056^a

T25-FW (s)

 Preoperative

22.4 (5.2)

24.0 (3.9)

20.8-23.2

23.1-24.9

0.193^a

 6 weeks

21.3(6.3)

22.0 (4.2)

19.6-22.4

20.0-23.1

0.385^a

 3 months

18.5 (3.7)

19.4 (3.8)

17.2-18.8

17.0-19.0

0.291^a

 6 months

18.3 (4.1)

19.9 (5.5)

17.1-18.9

17.5-20.5

0.040^a

 12 months

18.1 (3.4)

19.8 (4.6)

17.2-18.8

17.7-20.3

0.046^a

Activity VAS

 Preoperative

5.0 (0.8)

4.9 (0.8)

4.8-5.2

3.8-4.2

0.461^a

 6 weeks

6.9 (0.7)

6.8 (0.6)

5.8-6.2

5.8-6.2

0.031^a

 3 months

7.3 (0.8)

6.9 (0.5)

6.8-7.2

5.9-6.1

0.080^a

 6 months

7.3 (0.7)

6.9 (0.7)

6.8-7.2

6.7-7.1

0.223^a

 12 months

7.5 (0.6)

7.0 (0.7)

6.9-7.1

6.8-7.2

<0.001^a

Walking distance (m)

 12 months

6435 (4260)

5125 (3868)

5458-7412

4053-6197

0.045^a

SF-36 PCS

 Preoperative

27.4 (8.2)

25.6 (8.7)

25.5-28.8

23.0-27.0

0.152^a

 6 weeks

39.1 (9.7)

34.8 (9.8)

36,8-41,2

31.4-36.6

0.004^a

 3 months

44.6 (9.2)

40.7 (10.1)

41.9-46.1

37.3-42.7

0.031^a

 6 months

46.0 (10.0)

42.7 (5.6)

43.7-48.3

40.5-43.6

0.042^a

 12 months

47.5 (9.9)

42.9 (11.9)

44.7-49.3

40.1-43.9

0.017^a

SF-36 MCS

 Preoperative

57.2 (8.5)

56.3 (9.2)

55.1-58.9

53.9-58.1

0.405^a

 6 weeks

58.1 (8.7)

59.3 (6.6)

56.0-60.0

57.2-60.8

0.465^a

 3 months

56.0 (9.2)

56.7 (8.3)

53.9-58.1

53.8-58.2

0.774^a

 6 months

56.0 (10.0)

55.8 (7.2)

53.7-58.3

53.0-57.0

0.670^a

 12 months

55.0 (9.8)

56.2 (6.9)

52.8-57.3

54.1-57.9

0.714^a