Characteristics of the cohort.
| Characteristic | Mean (95% CI) |
| Crude offset distance from vertebral endplate center, mm, median (IQR) | 0.4 (−1.5 to +2) |
| APP | |
| Overall | 49.4% (47.5%–51.4%) |
| Anterior positioning group (n = 15) | 45.2% (43.2%–47.1%) |
| Posterior positioning group (n = 10) | 54.1% (51.4%–55.3%) |
| Translation at LFU | 1.6% (−1.6% to 4.9%) |
| Neck Disability Index | |
| Preoperative | 36.4% (28.9%–36.4%) |
| LFU | 13.9% (9.4%–17%) |
| Visual analog scale for neck pain score | |
| Preoperative | 8.1 (7.2–8.9) |
| LFU | 2.7 (2.1–3.3) |
| Visual analog scale for radicular pain score | |
| Preoperative | 7.2 (6.7–7.6) |
| LFU | 2.5 (2.1–2.9) |
| Range of Motion | |
| Preoperative | - |
| LFU | 10.8° (8.8°–12.9°) |
| Cobb angle C2–C7 | |
| Preoperative | 11.6° (8.6°–14.5°) |
| LFU | 15.6° (11.2°–18.8°) |
| Spinocranial angle | |
| Preoperative | 79° (75.1°–83.7°) |
| LFU | 74° (70.9°–77.9°) |
Abbreviations: APP, anteroposterior positioning; LFU, last follow-up.
Note: Data presented as mean (95% CI) unless otherwise noted.