Extensive epidural Leakage (n = 32) | Non-extensive epidural Leakage (n = 1866) | T/χ2/Z | P values | |
---|---|---|---|---|
The type of basivertebral foramen (magistral/dispersed) | 26/6 | 775/1091 | 20.346 | < 0.001* |
Volume of cement injected (ml)a | 2.56 ± 0.83 | 2.16 ± 0.78 | − 2.876 | 0.004* |
The distance between screw tip and the midline of vertebral body (mm)a | 4.27 ± 1.57 | 5.49 ± 2.39 | 2.894 | 0.004* |
The distance between screw tip and the posterior wall of the vertebral body (mm)a | 21.56 ± 3.58 | 24.15 ± 3.22 | 4.491 | < 0.001* |
Cement extension into pedicle area (yes/no) | 5/27 | 105/1761 | 5.760 | 0.016* |
Screw design (solid/fenestrated) | 10/22 | 418/1448 | 1.411 | 0.235 |