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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