Table 1.
Number of screws implanted by surgeons in the navigation and conventional groups
| Surgeon | Number of screws implanted | Total number of screws implanted (screws included + screws excluded) | |||
|---|---|---|---|---|---|
| Navigated group | Conventional group | 2/2006–4/2008 (Navigation) | 12/2000–2/2006 (Conventional) | 12/2000–4/2008 (Total) | |
| 1 | 2 | — | 4 | — | 4 |
| 2 | 8 | 3 | 15 | 14 | 29 |
| 3 | 6 | 2 | 7 | 6 | 13 |
| 4 | 1 | 4 | 3 | 4 | 7 |
| 5 | 1 | 7 | 1 | 24 | 25 |
| 6 | 7 | 1 | 9 | 1 | 10 |
| 7 | 1 | 5 | 1 | 18 | 19 |
| 8 | — | 2 | — | 17 | 17 |
| 9 | — | 8 | — | 17 | 17 |
| 10 | — | 3 | — | 9 | 9 |
| Total | Total 26 | Total 35 | Mean ± SD 5.7 ± 5.1 | Mean ± SD 12.2 ± 7.6 | Mean ± SD 15.3 ± 9.4 |
| 7 (navigation) | |||||
| 9 (conventional) | |||||
There is no difference in the average screw implantation experience of surgeons in the navigated and conventional groups (p = 0.24); SD = standard deviation.