TABLE 3.
Comparison of Preoperative (A) and Postoperative (B) Spinopelvic Parameters
| Preoperative X-ray | Non-ASD n=54 | ASD n=31 | P |
|---|---|---|---|
| A. Preoperative | |||
| Pelvic incidence (deg) | 52.9±11.6 | 56.9±12.5 | 0.141 |
| Sacral slope (deg) | 38.2±8.9 | 39.6±9.6 | 0.493 |
| Pelvic tilt (deg) | 14.4±7.5 | 17.7±7.9 | 0.056 |
| Lumbar lordosis (deg) | 55.2±12.4 | 53.7±13.0 | 0.601 |
| L4-S1 lordosis (deg) | 32.9±8.8 | 29.0±7.3 | 0.039 |
| Segmental lordosis in fusion site (deg) | 12.8±7.2 | 10.9±6.4 | 0.215 |
| PI-LL mismatch | −2.3±9.7 | 3.2±11.5 | 0.021 |
| B. Postoperative | |||
| Pelvic incidence (deg) | 52.4±11.9 | 56.7±12.4 | 0.122 |
| Sacral slope (deg) | 35.2±8.9 | 38.1±8.6 | 0.163 |
| Pelvic tilt (deg) | 17.2±6.9 | 18.9±7.8 | 0.309 |
| Lumbar lordosis (deg) | 48.2±12.6 | 51.5±10.9 | 0.218 |
| L4-S1 lordosis (deg) | 31.6±9.4 | 28.3±9.2 | 0.130 |
| Segmental lordosis in fusion site (deg) | 13.0±6.9 | 13.7±6.4 | 0.647 |
| PI-LL mismatch | 4.3±9.3 | 5.2±8.9 | 0.657 |
Bold values represent significant P values <0.05. ASD indicates adjacent segment degeneration.