|
| 41 | |
|
| Sex | | |
| Male | 18 (43.9%) | |
| Female | 23 (56.1%) | |
| Mean age (yrs) | | |
| Diagnosis | | |
| Degenerative spondylolisthesis | 33 (80.5%) | |
| Grade 1 | 31 | |
| Grade 2 | 2 | |
| Spinal canal stenosis | 8 (19.5%) | |
| Type of posterior fixation | | |
| Indirect decompression (PPS) | 41 (100%) | |
| Graft materials | | |
| Autografts and bone graft substitutes | 41 (100%) | |
| Number of fixation levels | | |
| 1 level | 31 (75.6%) | |
| 2 levels | 10 (24.3%) | |
| Fixation vertebral levels (including duplicate) | | |
| L3/4 | 15 | |
| L4/5 | 36 | |
| Combined with adjacent segment decompression | 0 | |
| Clinical surgical outcomes | | |
| Preop. JOA score | | |
| Postop. JOA score (vs. preop.) | | (<0.001) |
| Radiographical surgical outcomes | | |
| Preop. LL (degree) | | |
| Postop. LL (degree) (vs. preop.) | | (0.007) |
| Preop. PI-LL mismatch (degree) | | |
| Postop. PI-LL mismatch (degree) (vs. preop.) | | (0.007) |
| Preop. local lordosis (degree) | | |
| Postop. local lordosis (degree) (vs. preop.) | | (<0.001) |
| Preop. intervertebral height (mm) | | |
| Postop. intervertebral height (mm) (vs. preop.) | | (<0.001) |
| Radiographical parameters at cranial adjacent level | | |
| Facet joint osteoarthritis | | |
| 1 | 6 | |
| 2 | 17 | |
| 3 | 15 | |
| 4 | 3 | |
| Adjacent disc degeneration (Pfirrmann grading system) | |
| 1 | 0 | |
| 2 | 1 | |
| 3 | 7 | |
| 4 | 24 | |
| 5 | 9 | |
| Preop. dural sac cross-sectional area (mm2) | | |
| Postop. dural sac cross-sectional area (mm2) (vs. preop.) | | (0.005) |
| Facet joint violation, case | 2 (4.9%) | |
|
