Table 2 Comparison of the various parameters measured before and after surgery
Lumbar vertebral body | Sagittal angle of the CBT screws (°) | T-value | P-value | Axial angle of the CBT screws (°) | T-value | P-value | Sagittal angle of the TPT screws (°) | T-value | P-value | Axial angle of the TPT screws (°) | T-value | P-value | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Preoperative | Postoperative | Preoperative | Postoperative | Preoperative | Postoperative | Preoperative | Postoperative | |||||||||
L1 | 20.6 ± 1.1 | 19.9 ± 1.0 | 1.646 | 0.114 | 25.7 ± 0.9 | 24.9 ± 1.4 | 1.484 | 0.152 | 3.4 ± 0.8 | 3.2 ± 0.9 | 0.497 | 0.624 | 18.4 ± 2.7 | 19.3 ± 2.7 | − 0.830 | 0.415 |
L2 | 17.9 ± 1.0 | 18.2 ± 1.4 | − 0.534 | 0.599 | 21.7 ± 1.7 | 21.4 ± 1.6 | 0.465 | 0.646 | 3.3 ± 0.9 | 3.6 ± 0.9 | −0.914 | 0.371 | 15.3 ± 3.2 | 14.6 ± 2.1 | 0.658 | 0.519 |
L3 | 19.2 ± 0.9 | 18.9 ± 0.9 | 1.004 | 0.326 | 20.9 ± 2.7 | 21.2 ± 2.1 | −0.242 | 0.811 | 5.1 ± 0.6 | 4.9 ± 0.7 | 0.555 | 0.585 | 15.4 ± 1.0 | 15.0 ± 1.0 | 0.817 | 0.423 |
L4 | 17.3 ± 1.5 | 16.9 ± 1.4 | 0.827 | 0.417 | 25.6 ± 1.2 | 23.6 ± 3.5 | 1.935 | 0.066 | 11.2 ± 1.4 | 10.9 ± 1.5 | 0.366 | 0.718 | 18.6 ± 2.6 | 19.9 ± 2.2 | −1.246 | 0.226 |
L5 | 19.5 ± 0.6 | 20.1 ± 1.0 | − 1.710 | 0.101 | 27.9 ± 1.5 | 27.4 ± 1.2 | 0.926 | 0.365 | 11.0 ± 1.3 | 11.5 ± 1.5 | − 0.985 | 0.335 | 19.9 ± 2.7 | 21.9 ± 2.6 | −1.867 | 0.075 |