Table 1 Patients’ demographics and surgical parameters in 4 groups
Pattern 1 | Pattern 2 | P value | |||||
|---|---|---|---|---|---|---|---|
groups | type 0–1 | type 1 | (P value) | type 0–2 | type 2 | (P value) | |
Patients No | 34 | 21 | - | 30 | 27 | - | - |
Sex(m:f) | 4:30 | 3:18 | (0.785) | 6:24 | 3:24 | (0.476) | 0.753 |
Age at surgery | 63.3 ± 6.0 | 63.9 ± 6.0 | (0.750) | 64.4 ± 7.0 | 62.1 ± 6.9 | (0.212) | 0.578 |
Instrumented level | 8.9 ± 2.0 | 9.2 ± 3.5 | (0.695) | 8.0 ± 2.4 | 8.6 ± 2.1 | (0.390) | 0.327 |
UIV (T10 or above: below | 24:10 | 13:8 | (0.505) | 15:15 | 16:11 | (0.483) | 0.412 |
LIV (non-pelvic: S1 or below) | 11:23 | 6:15 | (0.768) | 7:23 | 4:23 | (0.416) | 0.447 |
Interbody fusions | 1.6 ± 1.1 | 1.5 ± 1.2 | (0.775) | 1.8 ± 1.2 | 1.7 ± 1.5 | (0.943) | 0.909 |
Osteotomy grade | 1.9 ± 0.4 | 1.8 ± 0.4 | (0.679) | 1.8 ± 0.4 | 1.8 ± 0.4 | (0.858) | 0.870 |
Osteotomy level | 3.5 ± 0.9 | 3.5 ± 0.7 | (0.915) | 3.2 ± 0.6 | 3.5 ± 0.8 | (0.073) | 0.190 |