Table 4 Postoperative radiographic parameters and demographics in the PD+ group according to whether revision surgery was required

Cases, n

9

18

–

Pre SVA (mm)

187.0 ± 62.3

193.4 ± 63.6

0.84

Post SVA (mm)

60.2 ± 27.4

57.7 ± 39.2

0.87

Pre LL (°)

−3.5 ± 27.3

4.9 ± 16.3

0.51

Post LL (°)

33.7 ± 13.4

44.6 ± 8.6

0.11

Pre TLK (°)

9.3 ± 6.9

11.2 ± 12.5

0.26

Post TLK (°)

11.4 ± 11.4

0.2 ± 11.6

0.074

Pre TK (°)

15.0 ± 16.0

26.3 ± 13.7

0.17

Post TK (°)

30.0 ± 18.5

40.1 ± 9.8

0.25

Pre SS (°)

16.2 ± 11.8

17.0 ± 6.5

0.87

Post SS (°)

24.3 ± 7.8

28.5 ± 6.2

0.28

Pre PT (°)

35.5 ± 7.3

37.0 ± 9.3

0.71

Post PT (°)

27.3 ± 5.2

26.2 ± 10.7

0.74

PI (°)

51.7 ± 8.7

54.6 ± 10.4

0.53

 Age at surgery (years)

68.5 ± 3.7

71.6 ± 6.5

0.19

 BMI

21.9 ± 3.7

23.8 ± 4.3

0.33

 Number of fixed levels

9.0 ± 2.5

10.2 ± 2.5

0.35

Duration of PD (months)

87.0 ± 56.9

32.5 ± 48.0

0.037

Hoehn and Yahr stage

2.8 ± 1.2

2.2 ± 1.3

0.29

 BMD (T-score)

−2.1 ± 1.7

− 1.8 ± 1.2

0.81