Table 2.
Baseline Preoperative Radiographic Parameters for All Patients and the Ideal and Non-Ideal Groups.
| All patients | Ideal group | Non-Ideal group | P | |
|---|---|---|---|---|
| PI | 47.9 ± 9.1 | 46.1 ± 8.2 | 49.8 ± 10.0 | .26 |
| PT | 33.0 ± 11.8 | 32.5 ± 10.3 | 33.5 ± 13.6 | .72 |
| LL | 2.0 ± 17.4 | 4.1 ± 13.7 | −0.2 ± 20.9 | .70 |
| TK | 23.4 ± 14.5 | 17.2 ± 16.2 | 29.6 ± 9.6 | <.05* |
| PI − LL | 46.0 ± 19.4 | 42.0 ± 16.9 | 49.9 ± 21.5 | .32 |
| SVA | 130.5 ± 74.7 | 85.9 ± 43.6 | 175.0 ± 73.6 | <.01* |
| T1SPI | 7.2 ± 8.9 | 1.7 ± 4.7 | 12.7 ± 8.8 | <.01* |
| T1-UIV | 17.3 ± 15.1 | 12.6 ± 17.0 | 22.0 ± 11.7 | <.05* |
| Unfused-PJA | 1.2 ± 7.8 | −0.5 ± 9.5 | 2.9 ± 5.5 | .55 |
Abbreviations: PI, pelvic incidence; PT, pelvic tilt; LL, lumbar lordosis; TK, thoracic kyphosis; PI − LL, pelvic incidence minus lumbar lordosis; SVA, sagittal vertical axis; T1SPI, T1 spino-pelvic inclination; T1-UIV, angle between T1 and UIV; Unfused-PJA, proximal junctional angle of unfused spine.
* Statistically significant difference between the Ideal and Non-Ideal groups. P < .05 (statistical significance).