Radiographic measurements.
| Radiographic Measure | N | Mean (SD) Change Compared With Preoperative | P Value |
| Lumbar lordosis, ° | |||
| Initial postoperative | 80 | 4.5 (8.6) | <0.001 |
| 3 mo postoperative | 57 | 4.4 (7.2) | <0.001 |
| Segmental lordosis, ° | |||
| Initial postoperative | 123 | 6.8 (4.8) | <0.001 |
| 3 mo postoperative | 85 | 6.7 (4.4) | <0.001 |
| Anterior disc height, mm | |||
| Initial postoperative | 123 | 8.0 (3.6) | <0.001 |
| 3 mo postoperative | 85 | 7.4 (3.6) | <0.001 |
| Posterior disc height, mm | |||
| Initial postoperative | 123 | 3.3 (2.4) | <0.001 |
| 3 mo postoperative | 85 | 3.1 (2.5) | <0.001 |
Note: Boldface indicates statistically significant findings with P value <0.05