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Table 2 Radiographic parameters of segmental alignment at different stages of OLIF procedures

From: Posterior fixation can further improve the segmental alignment of lumbar degenerative spondylolisthesis with oblique lumbar interbody fusion

 

Prior to cage insertion

Following cage insertion

Following posterior fixation

P Value

Comparison prior to Cage insertion and following cage insertion (P Value)

Comparison following cage insertion and following posterior fixation (P value)

Disc height (mm)

8.2 ± 1.6

11.8 ± 1.7

11.8 ± 2.3

< 0.001*

< 0.001*

1.000

Disc height-Anterior (mm)

9.6 ± 2.3

13.4 ± 2.1

13.7 ± 2.3

< 0.001*

< 0.001*

0.861

Disc height-Posterior (mm)

6.1 ± 1.9

9.1 ± 2.1

8.4 ± 1.8

< 0.001*

< 0.001*

0.254

Slip ratio (%)

11.1 ± 4.6

8.3 ± 4.4

2.1 ± 3.6

< 0.001*

0.020*

< 0.001*

Segmental lordosis (°)

8.7 ± 3.7

8.3 ± 3.0

10.7 ± 3.6

0.006*

1.000

0.008*

  1. *Means statistically significant