Mean (SD) change in radiographic parameters.
| Radiographic Measurement | N | Mean (SD) Change Compared With Preoperation | P |
| LL (°) | 95 | ||
| Initial postoperative | 2 (10) | 0.049 | |
| 1 y postoperative | 3 (9) | 0.005 | |
| SL (°) | 155 | ||
| Initial postoperative | 6 (5) | <0.001 | |
| 1 y postoperative | 5 (5) | <0.001 | |
| ADH (mm) | 155 | ||
| Initial postoperative | 8 (4) | <0.001 | |
| 1 y postoperative | 7 (4) | <0.001 | |
| PDH (mm) | 155 | ||
| Initial postoperative | 3 (2) | < 0.001 | |
| 1 y postoperative | 3 (2) | < 0.001 |
Abbreviations: ADH, anterior disc height; LL, lumbar lordosis; PDH, posterior disc height; SL, segmental lordosis.