Table 1.
The incidence of spinous process violation and pedicle wall penetration
| Complication | L1 (mm) | L2 (mm) | L3 (mm) | L4 (mm) | L5 (mm) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4.5 | 5.0 | 5.5 | 4.5 | 5.0 | 5.5 | 4.5 | 5.0 | 5.5 | 4.5 | 5.0 | 5.5 | 4.5 | 5.0 | 5.5 | |||||
| A (%) | |||||||||||||||||||
| Male | 62.5 | 64.6 | 65.6 | 52.1 | 52.1 | 53.1 | 25.0 | 26.0 | 26.0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||
| Female | 75.0 | 77.3 | 77.3 | 54.8 | 56.0 | 56.0 | 26.1 | 27.4 | 28.6 | 3.6 | 3.6 | 3.6 | 0 | 0 | 0 | ||||
| Total | 68.3 | 70.5 | 71.1 | 53.3 | 53.8 | 54.4 | 25.5 | 26.7 | 27.2 | 1.7 | 1.7 | 1.7 | 0 | 0 | 0 | ||||
| p Valuea | 0.072 | 0.060 | 0.083 | 0.719 | 0.603 | 0.704 | 0.855 | 0.839 | 0.704 | 0.100 | 0.100 | 0.100 | – | – | – | ||||
| B (%) | |||||||||||||||||||
| Male | 13.5 | 19.8 | 29.1 | 8.3 | 22.9 | 32.9 | 1.0 | 8.3 | 20.8 | 0 | 1.0 | 3.1 | 3.1 | 7.3 | 12.5 | ||||
| Female | 20.2 | 32.1 | 42.8 | 17.8 | 29.7 | 36.9 | 4.8 | 17.8 | 27.4 | 2.4 | 6.0 | 10.7 | 10.7 | 16.6 | 21.4 | ||||
| Total | 16.7 | 25.5 | 35.5 | 12.7 | 26.1 | 34.4 | 2.8 | 12.7 | 23.8 | 1.1 | 3.3 | 6.7 | 6.7 | 11.7 | 16.7 | ||||
| p Valuea | 0.229 | 0.058 | 0.056 | 0.056 | 0.297 | 0.516 | 0.186 | 0.056 | 0.304 | 0.216 | 0.099 | 0.069 | 0.069 | 0.051 | 0.066 | ||||
| C (%) | |||||||||||||||||||
| Male | 2.1 | 4.2 | 14.5 | 0 | 1.0 | 9.4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||
| Female | 6.0 | 10.0 | 14.2 | 2.4 | 3.6 | 6.0 | 0 | 0 | 4.8 | 0 | 0 | 0 | 0 | 0 | 0 | ||||
| Total | 3.9 | 6.7 | 14.4 | 1.1 | 2.2 | 7.8 | 0 | 0 | 2.2 | 0 | 0 | 0 | 0 | 0 | 0 | ||||
| p Valuea | 0.254 | 0.231 | 0.955 | 0.216 | 0.340 | 0.392 | – | – | 0.186 | – | – | – | – | – | – | ||||
A Spinous process violation, B Screw penetration through the inner wall of pedicle, C Screw penetration through the outer wall of pedicle, L Lumbar
a Comparison between genders