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Table 3 The radiographic data of “6/4 screws” groups

From: Effects of pedicle screw number and insertion depth on radiographic and functional outcomes in lumbar vertebral fracture

 

ALL

Long screws

Short screws

6 screws

4 screws

P

6 screws

4 screws

P

6 screws

4 screws

P

FL

 Pre

− 17.60 ± 5.66

− 18.68 ± 4.70

0.428

− 17.41 ± 6.75

− 17.71 ± 3.87

0.879

− 17.83 ± 4.13

− 19.91 ± 5.52

0.258

 1 month

− 5.15 ± 3.81*

− 8.48 ± 4.10*

0.001

− 4.64 ± 4.51*

− 7.43 ± 2.65*

0.044

− 5.78 ± 2.73*

− 9.82 ± 5.27*

0.011

 Final

− 8.30 ± 4.43*

− 11.08 ± 4.37*

0.016

− 7.05 ± 4.90*

− 9.36 ± 2.73*

0.117

− 9.83 ± 3.29*

− 13.27 ± 5.16*

0.037

SL

 Pre

12.63 ± 5.90

11.16 ± 5.76

0.329

13.45 ± 6.76

11.71 ± 5.47

0.425

11.61 ± 4.62

10.45 ± 6.31

0.574

 1 month

24.70 ± 4.65*

20.68 ± 4.75*

0.001

25.68 ± 4.75*

21.93 ± 4.23*

0.022

23.50 ± 4.34*

19.09 ± 5.09*

0.019

 Final

21.85 ± 5.70*

17.16 ± 6.29*

0.003

23.59 ± 5.18*

19.57 ± 5.09*

0.029

19.72 ± 5.71*

14.09 ± 6.53

0.021

LL

 Pre

31.20 ± 7.20

29.44 ± 7.10

0.339

31.91 ± 7.44

30.50 ± 7.17

0.578

30.33 ± 7.01

28.09 ± 7.12

0.413

 1 month

41.33 ± 6.68*

36.28 ± 6.64*

0.004

42.77 ± 5.71*

37.71 ± 6.45*

0.019

39.56 ± 7.49*

34.45 ± 6.71*

0.075

 Final

39.28 ± 6.82*

34.12 ± 6.98*

0.005

41.18 ± 5.67*

36.79 ± 6.24*

0.028

36.94 ± 7.52*

30.73 ± 6.62

0.032

SS

 Pre

35.10 ± 8.31

35.08 ± 10.95

0.993

34.86 ± 6.69

36.07 ± 10.62

0.677

35.39 ± 10.15

33.82 ± 11.75

0.706

 1 month

35.08 ± 8.76

35.40 ± 10.62

0.894

33.64 ± 6.78

36.79 ± 10.35

0.276

36.83 ± 10.65

33.64 ± 11.19

0.448

 Final

36.20 ± 8.80

35.68 ± 11.97

0.841

35.95 ± 7.13

37.50 ± 12.33

0.636

36.50 ± 10.70

33.36 ± 11.65

0.465

PT

 Pre

17.83 ± 8.38

19.08 ± 8.50

0.561

18.36 ± 8.97

18.93 ± 9.34

0.857

17.17 ± 7.79

19.27 ± 7.75

0.485

 1 month

15.50 ± 7.91

16.76 ± 7.09

0.518

15.82 ± 8.94

16.79 ± 7.29

0.737

15.11 ± 6.68

16.73 ± 7.18

0.544

 Final

15.55 ± 7.27

16.16 ± 6.80

0.737

15.68 ± 8.10

15.43 ± 7.19

0.925

15.39 ± 6.34

17.09 ± 6.50

0.493

PI

 Pre

52.55 ± 10.51

54.44 ± 13.99

0.537

51.86 ± 12.75

55.21 ± 13.98

0.464

53.39 ± 7.16

53.45 ± 14.62

0.987

 1 month

51.05 ± 9.77

52.08 ± 12.18

0.708

50.36 ± 11.27

52.71 ± 12.46

0.562

51.89 ± 7.80

51.27 ± 12.36

0.870

 Final

50.65 ± 9.64

52.80 ± 12.31

0.435

50.14 ± 11.22

53.79 ± 12.67

0.372

51.28 ± 7.55

51.55 ± 12.32

0.942

  1. FL fractured vertebral lordosis, SL segmental lordosis, LL lumbar lordosis, SS sacral slope, PT pelvic tilt, PI pelvic incidence
  2. *Statistically significant compared with the preoperative, p < 0.05; Bold represents there is statistical significance between the groups, p < 0.05