Pre- and postoperative patient radiographic data.
| Radiographic Characteristic | Mean (SD) | P a | |
| Preoperative | Postoperative | ||
| Pelvic tilt, ° | 19.0 (8.4) | 17.7 (8.2) | 0.04 |
| Pelvic incidence, ° | 56.0 (15.4) | 57.4 (12.9) | 0.11 |
| Sacral slope, ° | 37.0 (11.3) | 39.6 (10.0) | 0.002 |
| Lumbar lordosis, ° | 52.4 (14.4) | 54.8 (14.2) | 0.03 |
| PI − LL, ° | 3.6 (12.2) | 2.3 (10.9) | 0.28 |
| T2–T5 thoracic kyphosis, ° | 15.4 (5.8) | 14.3 (6.6) | 0.19 |
| T5–T12 thoracic kyphosis, ° | 32.9 (6.9) | 32.5 (8.5) | 0.95 |
| T1 pelvic angle, ° | 15.2 (8.3) | 13.9 (7.9) | 0.08 |
| Sagittal vertical axis, ° | 31.2 (45.3) | 19.7 (47.1) | 0.12 |
| L1–L2 SL, ° | 0.2 (4.7) | 0.7 (4.0) | 0.03 |
| L2–L3 SL, ° | 6.7 (4.5) | 4.9 (4.6) | 0.002 |
| L3–L4 SL, ° | 9.4 (3.9) | 7.1 (4.2) | <0.001 |
| L4–L5 SL, ° | 16.4 (4.8) | 14.4 (5.2) | 0.002 |
| L5–S1 SL, ° | 19.6 (5.2) | 29.6 (6.8) | <0.001 |
| Global tilt, ° | 19.0 (9.9) | 17.5 (9.4) | 0.07 |
| Anterior disc height, mm | 9.5 (3.2) | 19.7 (4.1) | <0.001 |
| Posterior disc height, mm | 4.7 (1.5) | 7.7 (2.5) | <0.001 |
| Neuroforaminal height, mm | 12.2 (3.1) | 14.6 (3.2) | <0.001 |
Abbreviations: PI − LL, difference between pelvic incidence and lumbar lordosis; SL, segmental lordosis.
Note: Boldface indicates statistical significance at P < 0.05.
↵a By paired t test.