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Incidence of screw displacement on post-operative CT-scans
| Level | Number of screws | % of screws | ||
|---|---|---|---|---|
| Group 1 | Group 2 | Group 3 | ||
| C2 | 13 | 1 | 0 | 7.14 |
| C3 | 2 | 4 | 0 | 66.67 |
| C4 | 7 | 5 | 0 | 41.67 |
| C5 | 2 | 2 | 0 | 50.00 |
| C6 | 8 | 4 | 0 | 33.33 |
| C7 | 3 | 1 | 0 | 25.00 |
| Th1 | 8 | 0 | 0 | 0.00 |
| Th2 | 6 | 0 | 0 | 0.00 |
| Th3 | 4 | 0 | 0 | 0.00 |
| Th4 | 2 | 0 | 0 | 0.00 |
| Total | 55 | 17 | 0 | |
| Percentage | 76.4 | 23.6 | 0.0 | |
