Table 2.
Subsidence and presence of ALOD between short and medium plate.
| Short Plate (n = 47) | Medium Plate (n = 32) | Overall | p-Value | |
|---|---|---|---|---|
| Immediate Post-op | ||||
| Screw Angle Superior | 22.8 ± 5.3 | 12.3 ± 2.5 | 18.5 ± 6.8 | <0.001 |
| Screw Angle Inferior | 23.3 ± 4.7 | 13.2 ± 3.2 | 19.2 ± 6.5 | <0.001 |
| Control for Subsidence | 61.6 ± 19.8 | 57.3 ± 22.5 | 59.9 ± 20.9 | 0.375 |
| 3 Months | ||||
| Screw Angle Superior | 21.4 ± 5.0 | 11.0 ± 2.5 | 17.2 ± 6.6 | <0.001 |
| Screw Angle Inferior | 22.0 ± 4.6 | 11.8 ± 3.6 | 17.9 ± 6.5 | <0.001 |
| Subsidence Rate | 2.1 ± 1.9 | 2.9 ± 2.8 | 2.4 ± 2.3 | 0.133 |
| Subsidence >3 mm (n, %) | 2 (4.26) | 4 (12.5) | 6 (7.59) | 0.179 |
| 1 Year | ||||
| Screw Angle Superior | 20.9 ± 5.0 | 10.7 ± 2.6 | 16.7 ± 6.6 | <0.001 |
| Screw Angle Inferior | 20.9 ± 5.0 | 11.2 ± 3.5 | 17.0 ± 6.5 | <0.001 |
| Subsidence Rate | 1.9 ± 1.8 | 3.2 ± 2.7 | 2.5 ± 2.3 | 0.017 |
| Subsidence >3 mm (n, %) | 4 (8.5) | 8 (25.0) | 12 (15.2) | 0.045 |
| ALOD | 6 (12.8) | 10 (31.2) | 16 (20.2) | 0.045 |
Note: ALOD: Adjacent Level Ossified Disease.