Table 6.
Effects of LIF and PCO/PSF on segmental disc angle and PI–LL
| Variable | Preoperative |
After LIF |
After PCO/PSF |
|||
|---|---|---|---|---|---|---|
| Standing position | FBB film | CT sag. | X-ray at prone position | X-ray at prone position | CT sag. | |
| Disc angle (°) | - | 4.3 (0 to 11) | 3.3 (−1 to 9) | 5.8 (0 to 12) | 8.1 (0 to 16) | 10.4 (4 to 21) |
| p-value | - | - | - | 0.053 (vs. FBB film) | 0.013 (vs. after LIF) | <0.01 (vs. after LIF) |
| <0.01 (vs. CT sag.) | ||||||
| PI–LL (°) | 42 (−6 to 83) | 15 (−6 to 37) | - | 15 (−3 to 42) | 0 (−16 to 19) | - |
| p-value | - | - | - | 0.94 (vs. FBB film) | <0.01 (vs. after LIF) | <0.01 (vs. after LIF) |
Values are presented as mean (range).
LIF, lateral lumbar interbody fusion; PCO, posterior-column osteotomy; PSF, posterior spinal fusion; PI, pelvic incidence; LL, lumbar lordosis; FBB, fulcrum backward bending; CT sag., sagittal computed tomographic view.