Skip to main content

Table 2 Relationship of radiological parameters and S1 screw loosening

From: The relationship between S1 screw loosening and postoperative outcome in patients with degenerative lumbar scoliosis

  S1 screw non-loosening group S1 screw loosening group P value
Cobb angle (°)
 Preoperative 27.8 ± 13.2 28.7 ± 12.1 0.759
 Soon after surgery 11.3 ± 7.3 10.2 ± 5.9 0.460
 Change −16.5 ± 8.4 −18.5 ± 8.7 0.298
 Final 11.4 ± 6.3 10.3 ± 5.2 0.392
Sagittal vertical axis (mm)
 Preoperative 43.7 ± 44.4 47.2 ± 51.1 0.745
 Soon after surgery 25.0 ± 34.2 14.4 ± 41.0 0.252
 Change −21.2 ± 57.3 −31.8 ± 57.7 0.456
 Final 46.7 ± 35 54.2 ± 38.2 0.392
PT (°)
 Preoperative 22.4 ± 11.8 24.1 ± 10.5 0.533
 Soon after surgery 17.5 ± 10.3 17.3 ± 8.3 0.923
 Change −4.4 ± 10.1 −6.8 ± 7.7 0.265
 Final 21.7 ± 10.2 22.6 ± 9.5 0.696
LL(°)
 Preoperative 26.4 ± 15.0 23.0 ± 15.1 0.334
 Soon after surgery 37.7 ± 10.0 36.5 ± 11.0 0.619
 Change 11.3 ± 13.4 13.5 ± 13.3 0.482
 Final 31.9 ± 10.1 30.1 ± 12.7 0.502
 Preoperative PI-LL (°) 20.3 ± 16.4 23.8 ± 17.4 0.372
TPA
 Preoperative 20.2 ± 11.8 22.0 ± 11.5 0.503
 Soon after surgery 13.5 ± 8.4 12.6 ± 7.9 0.638
 Change −6.2 ± 9.8 −9.5 ± 8.2 0.145
 Final 20.1 ± 10.4 21.3 ± 9.2 0.599
 Blood loss (ml) 1244.4 ± 709.9 1294.1 ± 946.5 0.798
 Operative time (min) 278.4 ± 55.2 277.7 ± 63.5 0.960
 Average  hospitalization (days) 13.1 ± 6.8 14.6 ± 9.0 0.425
 ODI score 27.2 ± 21.6 31.6 ± 18.9 0.366