Skip to main content

Table 2 Radiologic data for patients

From: Risk factors for predicting symptomatic adjacent segment degeneration requiring surgery in patients after posterior lumbar fusion

Characteristics Patients with SASDS
Yes (n = 28) No (n = 56) Pvalues
Preoperative ADD on MRI, n (%)    0.011
Yes 16 (57.1) 16 (28.6)  
No 12 (42.9) 40 (71.4)  
Disc bulge in preoperative CT examination, n (%)    0.000
Yes 27 (96.4) 8 (14.3)  
No 1 (3.6) 48 (85.7)  
Preoperative distance from L1 to S1 sagittal plumb line (mm) 22.8 ± 16.5 14.2 ± 17.0 0.031
Preoperative lumbar lordosis (°) 34.4 ± 14.4 43.0 ± 12.2 0.005
Preoperative S1 sagittal slope angle (°) 33.6 ± 10.4 34.8 ± 7.5 0.540
Preoperative adjacent disc height (mm) 8.8 ± 2.5 10.4 ± 2.2 0.003
Preoperative adjacent disc angle (°) 9.5 ± 4.7 10.1 ± 4.4 0.572
Postoperative distance from L1 to S1 sagittal plumb line (mm) 17.6 ± 18.1 14.5 ± 14.0 0.384
Postoperative lumbar lordosis (°) 33.3 ± 11.4 39.8 ± 10.4 0.010
Postoperative S1 sagittal slope angle (°) 31.8 ± 9.1 34.3 ± 7.0 0.168
Postoperative adjacent disc height (mm) 8.5 ± 2.4 10.1 ± 2.2 0.002
Postoperative adjacent disc angle (°) 9.4 ± 5.7 8.9 ± 4.4 0.661
  1. Note: SASDS symptomatic adjacent segment degeneration surgery, ASD adjacent segment degeneration.