Summary of radiographic data.
| Variable | N | Mean (SD) | P | ||
| Preoperative | Postoperative | Preoperative to Postoperative | |||
| LL (°) | |||||
| L1–S1 | 107 | 44.4 (16.2) | 55.1 (12.8) | 10.7 (14.5) | <0.001 |
| L1–L4 | 107 | 19.7 (12.0) | 21.4 (10.8) | 1.8 (10.8) | 0.1 |
| L4–S1 | 106 | 30.9 (10.3) | 38.4 (8.7) | 7.5 (8.2) | <0.001 |
| T4–T12 Thoracic kyphosis (°) | 42 | 31.7 (14.7) | 45.4 (12.4) | 13.6 (12.5) | <0.001 |
| Spinopelvic parameters (°) | |||||
| Sacral slope | 103 | 33.0 (11.0) | 37.6 (10.9) | −4.7 (6.9) | <0.001 |
| Pelvic tilt | 103 | 19.6 (9.5) | 18.2 (9.1) | 1.4 (5.7) | 0.02 |
| PI | 103 | 52.5 (12.3) | 55.8 (12.9) | −3.3 (6.3) | <0.001 |
| PI-LL | 102 | 8.9 (15.1) | 1.1 (13.5) | 7.8 (14.2) | <0.001 |
| Sagittal vertical axis, mm | 44 | 48.2 (56.8) | 24.5 (55.3) | 23.8 (53.4) | 0.005 |
Abbreviations: LL, lumbar lordosis; PI, pelvic incidence.