Table 2.
Radiological outcomes
| Group A (n = 52) |
Group B (n = 55) |
P | |
|---|---|---|---|
| SA (°) | |||
| Pre-op | 2.0 ± 3.6 | 1.6 ± 3.3 | 0.556 |
| 6 m post-op | 8.6 ± 3.3* | 8.2 ± 3.7* | 0.563 |
| Final follow-up | 7.0 ± 3.3*# | 6.6 ± 2.9*# | 0.513 |
| IH (mm) | |||
| Pre-op | 35.4 ± 2.3 | 36.2 ± 2.8 | 0.119 |
| 6 m post-op | 37.5 ± 2.1* | 37.8 ± 2.5* | 0.519 |
| Final follow-up | 36.7 ± 1.8*# | 35.9 ± 1.9# | 0.037 |
| C2-7a (°) | |||
| Pre-op | 12.8 ± 9.6 | 13.1 ± 10.0 | 0.863 |
| 6 m post-op | 20.5 ± 11.5* | 19.3 ± 11.8* | 0.609 |
| Final follow-up | 19.8 ± 9.4* | 18.9 ± 10.0* | 0.623 |
| Fusion rate | |||
| 6 m post-op | 57.6% (30/52) | 56.3% (31/55) | 0.890 |
| Final follow-up | 98.0% (51/52) | 96.3 (53/55) | 0.592 |
| Subsidence rate | |||
| 6 m post-op | 0% (0/52) | 0% (0/55) | – |
| Final follow-up | 5.8% (3/52) | 18.2 (10/55) | 0.046 |
SA, sagittal alignment; IH, intervertebral height; C2-7a, C2-7 angle; Pre-op, preoperative; 6 m post-op, 6-month postoperative
*p < 0.05 compared with pre-op
#p < 0.05 compared with 6 m post-op