Table 5.
Summary of radiographic measurements
| Variable | RAF | FGF | Statistic (χ2/Z/t) | P value |
|---|---|---|---|---|
| No. of pts | 34 | 36 | – | – |
| Kyphosis Cobb angle (KCA) (°) | ||||
| Preoperative KCA | 20.2 ± 5.8 | 20.9 ± 4.3 | − 0.613 | 0.542 |
| Postoperative KCA | 8.2 ± 4.8 | 8.7 ± 3.9 | − 0.494 | 0.621 |
| Postoperative KCA correction | 12.0 ± 4.4 | 12.2 ± 3.4 | − 0.256 | 0.798 |
| KCA at 1-y FU | 11.9 ± 4.7 | − 9.3 ± 3.9 | − 1.374 | 0.174 |
| Correction loss at 1-y FU | 3.8 ± 1.8 | 4.9 ± 4.2 | − 1.485 | 0.138 |
| Anterior height ratio of fracture vertebral (VHR) (%) | ||||
| Preoperative VHR | 62.0 ± 11.2 | 60.7 ± 14.3 | 0.419 | 0.676 |
| Postoperative VHR | 84.6 ± 9.9 | 82.5 ± 11.4 | 0.812 | 0.420 |
| Postoperative VHR Correction | 22.6 ± 12.1 | 21.9 ± 12.9 | − 0.106 | 0.910 |
| VHR at 1-y FU | 79.2 ± 7.9 | 76.1 ± 10.7 | 1.356 | 0.180 |
| Correction loss at 1-y FU | 5.5 ± 4.9 | 6.4 ± 5.7 | − 0.975 | 0.329 |
| Screw loosening rate of pts (%) | 2 (5.9%) | 6 (16.7%) | 2.009 | 0.156 |
RAF robot-assisted percutaneous pedicle screw fixation, FGF fluoroscopy-guided percutaneous pedicle screw fixation, KCA Kyphosis Cobb angle, AVHR anterior vertebral height ratios, 1-y FU 1-year follow-up, pts patient