Table 4 Pedicle screw accuracy rate
Variable | RAF | FGF | Statistic (χ2) | P value |
|---|---|---|---|---|
No. of screws | 204 | 216 | ||
Screw accuracy rate | 11.750 | 0.019* | ||
Grade A | 186 (91.2%) | 173 (80.1%) | ||
Grade B | 11 (5.4%) | 20 (9.3%) | ||
Grade A + B | 197 (96.6%) | 193 (89.4%) | ||
Grade C | 5 (2.4%) | 15 (6.9%) | ||
Grade D | 2 (1.0%) | 6 (2.8%) | ||
Grade E | 0 | 2 (0.9%) | ||
Grade C + D + E | 7 (3.4%) | 23 (10.6%) |