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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