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Table 5 Lumbar sagittal alignment–CBT Group VS. PS Group

From: May the midline lumbar interbody fusion (MIDLIF) prevent the early radiographic adjacent segment degeneration? A minimum 3-year follow-up comparative study of MIDLIF in L4/5 with cortical bone trajectory screw versus traditional pedicle screw fixation

Variable

Pre-operative

1 month FU

Last FU

mean ± SD

mean ± SD

P Value

mean ± SD

p Value

CBT Group N = 74

LL (°)

44.71 ± 8.97

44.88 ± 9.45

0.76

47.87 ± 9.00

0.02

SS (°)

33.97 ± 7.36

38.33 ± 8.47

0.00

37.34 ± 8.27

0.00

COBB 1 (°)

10.94 ± 3.79

13.15 ± 3.48

0.00

12.62 ± 3.34

0.00

COBB 2 (°)

17.86 ± 5.95

19.70 ± 5.63

0.00

19.52 ± 5.54

0.00

H 2 / H 1

2.32 ± 0.47

2.88 ± 0.70

0.00

3.06 ± 1.14

0.01

PS Group N = 114

LL (°)

39.05 ± 12.03

41.28 ± 12.38

0.00

47.48 ± 14.44

0.00

SS (°)

31.81 ± 8.2

34.97 ± 7.39

0.00

38.19 ± 8.90

0.00

COBB 1 (°)

6.53 ± 5.01

11.33 ± 3.12

0.00

11.73 ± 3.47

0.00

COBB 2 (°)

13.58 ± 7.70

19.89 ± 5.31

0.00

20.43 ± 5.08

0.00

H 2 / H 1

1.87 ± 0.87

2.21 ± 0.87

0.00

2.66 ± 0.90

0.00

  1. Cobb 1: the Cobb angle of intervertebral space among L4-5; Cobb 2: L4-5 Cobb; H1: height of posterior edges of intervertebral space among L4-5; H2: height of anterior edges of intervertebral space among L4-5